Exhibit 10.26



                                [REDACTED COPY]*





                             DISTRIBUTION AGREEMENT

                          Dated as of November 24, 1998

                                     Between


                               IMMUNOMEDICS, INC.

                                       and

                           ELI LILLY DEUTSCHLAND GmbH




















* Confidential portions  omitted and  filed separately  with  the Securities add
Exchange Commission











                                              Distribution Agreement


This agreement is made this 24th day of November, 1997 between:

IMMUNOMEDICS,  INC.,  a Delaware  corporation  having its office at 300 American
Road, Morris Plains, New Jersey, USA ("IMMU"):

and

ELI LILLY DEUTSCHLAND GmbH, Teichweg 3, D-35396 Giessen, Germany
("LILLY")

WHEREAS:

In  previous  discussions  between the  parties,  each party  indicated  that it
desired to enter into an Agreement by which LILLY would render certain  services
with respect to the  distribution  within the European  Union and certain  other
countries  of  IMMU's  product,  LeukoScan(R)  (hereinafter  referred  to as the
"Product"),  including without limitation,  importation of the Product,  storage
and inventory  management of the Product,  label and package insert printing and
label  placement for the Product,  packaging  into  individual  boxes,  picking,
packing  and  shipping  of the  Product  to end  users and  preparation  of IMMU
invoices for the shipments.  Accordingly, there follows the mutual understanding
between  IMMU and  LILLY  as to the  terms  and  conditions  applicable  to this
Agreement.

NOW IT IS HEREBY AGREED AS FOLLOWS:
1.       Import of the Product into the European Union
1.1      The Product is manufactured in the United States of America.
         IMMU warrants that the Product has the necessary regulatory



                                       1





         and legal  approvals for the export  thereof out of the US with import,
         sale, and distribution to countries in the European Union and any other
         country in which the Product shall be sold. IMMU has the responsibility
         to maintain these approvals.  If for whatever reason, LILLY is required
         to receive  regulatory  and legal  approvals  for the  Product  for the
         activities covered in this Agreement,  IMMU will provide LILLY with the
         information necessary to secure such approvals.
1.2      The port of arrival of the Product is LILLY, Giessen, Germany.
1.3      IMMU shall arrange for transport of the Product (contained in
         glass  vials) to the port of arrival in  accordance  with the  relevant
         instructions  given by LILLY  with  respect  to the  addressing  of the
         shipment, proper labeling in accordance with international regulations,
         and the contents of the necessary documentation. Cost for transport and
         insurance  fees covering  damage and loss of the Product to the port of
         arrival shall be for the account of IMMU.
1.4      Product  delivered to LILLY by IMMU  hereunder  for storage,  labeling,
         packaging and  distribution  will remain at all times under and subject
         to the  ownership,  direction and control of IMMU until sold to the end
         users.  Title to the Product  distributed  by LILLY will pass  directly
         from IMMU to the end users who  purchase  the Product  from IMMU.  IMMU
         shall bear the risk of loss of the Product not yet  delivered  by LILLY
         to a customer,  whether by fire,  theft, or other  casualty;  provided,
         however, that LILLY shall promptly reimburse IMMU [*] for each




                                        2





         vial of the Product which is lost or damaged as a result of
         LILLY's negligence.
1.5      LILLY  shall take all  reasonable  steps to clear the  Product  through
         Customs.  All clearance  fees and levied  import  duties and taxes,  if
         charged to LILLY as  importer  of the  Product,  are for the account of
         IMMU and will be  reimbursed by IMMU upon LILLY's  presentation  of the
         corresponding invoices and/or charge notes.

2.       Quality Control of the Product
2.1      IMMU  warrants  to LILLY  that each lot of  Product  imported  into the
         European Union (and into those countries  outside of the European Union
         to which IMMU requests LILLY to deliver the Product) shall satisfy,  at
         the time of importation,  all quality criteria set forth in its Summary
         of Product Characteristics. Promptly following arrival of each shipment
         of the  Product,  LILLY shall  conduct all  necessary  quality  control
         inspections,  according to procedures  and  specifications  agreed with
         IMMU,  including without limitation,  labeling,  documentation,  visual
         inspection  of each lot of the Product for external  container or other
         damage  or  loss,  and  inspection  of the  temperature  recorder  data
         accompanying  such  shipment  to  determine  that the  Product  was not
         exposed to temperatures outside of the acceptable range defined by IMMU
         during the transport thereof to the port of arrival. LILLY shall report
         any such damage or loss to IMMU promptly. IMMU




                                        3





         will promptly  notify LILLY of any change made in quality  criteria and
         in quality control procedures and  specifications  which is relevant to
         the  activities  and  services  provided  by  LILLY  pursuant  to  this
         Agreement.
2.2      IMMU warrants to LILLY that the packing and storage conditions required
         for the Product,  either in transit or during  warehouse  storage,  are
         such  that  the   Product   will   continue   to  satisfy  all  quality
         specifications  as  defined in the  Summary of Product  Characteristics
         during the entire  period of storage until a  predetermined  expiration
         date,  provided  LILLY stores and ships the Product in accordance  with
         approved procedures.
2.3      To enable LILLY to perform its packaging and distribution  function for
         the Product,  IMMU shall provide  LILLY with those details  relating to
         the  Product  as are  required  by the  European  Union  or  applicable
         national regulations. If required by competent authorities,  IMMU shall
         authorize qualified LILLY representatives (Manufacturing and/or Quality
         Control) (collectively, "LILLY Representatives") to inspect the Product
         facility and its operational procedures. This inspection does not imply
         that IMMU has any  obligation  to reveal its trade secrets with respect
         to the essential steps of manufacturing the Product. IMMU shall provide
         LILLY  with all  information  relevant  to the  release  of each lot of
         Product,  including  (but not limited to) the relevant  Certificate  of
         Analysis  for  the  Product  provided  by  a  European  Union-qualified
         laboratory. LILLY grants the right to IMMU to




                                        4





         inspect LILLY's labeling, packaging, storage and shipping
         facilities.
2.4      IMMU  shall  perform  or shall  have  performed  on all lots of Product
         imported, all relevant tests required by European Union regulations, or
         by the applicable national law of countries outside the European Union.
         Such tests as IMMU is unable to perform  itself  will be  executed by a
         qualified third party  laboratory  within the European Union. No lot of
         Product  shall  be  shipped  by IMMU to LILLY  until  the  third  party
         laboratory  shall have certified that the sample batch  therefrom shall
         have satisfied all required tests.
2.5      IMMU will  indicate  clearly in all its  correspondence,  documents and
         product   labels  the  item  number,   product  name,   lot  number(s),
         manufacturing date(s) and expiry date(s) of each shipment of Product.
2.6      Any  information  IMMU  possesses or receives  which casts doubt on the
         usability  of the Product,  or a specific lot of the Product,  shall be
         promptly  shared  with an  authorized  representative  of LILLY  and in
         consultation  between IMMU and LILLY all the  necessary  decisions  and
         steps will be made and taken to  control  further  distribution  of the
         Product or specific lot of the Product in question.  LILLY will provide
         IMMU with all necessary information and support to perform a recall, if
         required.  The final  decision as to whether a recall is required,  and
         notification  to end users,  is the  responsibility  of IMMU. All costs
         associated with such




                                        5





         actions  shall be for the account of IMMU,  unless such defect shall be
         due to the fault or negligence of LILLY in performing  its  obligations
         under this  Agreement,  in which  event  such  costs  shall be borne by
         LILLY.  The recalled and returned  Product  shall be kept  available to
         IMMU to be treated in the way IMMU deems fit. IMMU cannot direct return
         of whatever number of vials of the recalled  material LILLY is required
         by applicable law to retain.
2.7      LILLY  Representatives  will  release the  finished  lots  according to
         current LILLY procedures and based on (but not limited to) the relevant
         Certificate   of   Analysis   provided  by  the   authorized   European
         Union-qualified  laboratory.  If a  deviation  which  might  affect the
         quality  of the  Product  occurs,  LILLY  will  consult  with  IMMU for
         finished lot approval.
2.8      IMMU shall  provide  LILLY  with all  necessary  information  about the
         Product,  including but not limited to, safety data, in order to enable
         the appropriate and safe handling of the Product by LILLY.

3.       Storage  of  the  Product  and   Inventory  Management  3.1 Storage and
         shipping  conditions  for the Product have been defined by IMMU.  LILLY
         has determined that these conditions can be met.  IMMU  shall  have the
         right to  inspect  LILLY's  facilities  to  verify  LILLY's  ability to
         comply therewith.
3.2      The Product shall be stored by LILLY in a chill room between  2(degree)
         and 8(degree)C according to the relevant conditions as specified




                                        6





         by IMMU.  LILLY  shall at all  times  reserve  sufficient  capacity  to
         satisfy  IMMU's  reasonable  needs.  LILLY shall  maintain  temperature
         recorder charts and similar materials,  reviewed and approved by LILLY,
         to evidence actual storage conditions.
3.3      LILLY shall  exercise all  reasonable  care as is usual in the industry
         for similar  categories  of product  during the handling of the Product
         before  and while in storage  and during  order  picking,  packing  and
         shipping  actions,  and warrants that its personnel is able to exercise
         such  reasonable  care by experience and proper  training.  LILLY shall
         maintain adequate insurance coverage acceptable to IMMU for the storage
         of the Product under the terms of this Agreement.
3.4      LILLY will maintain records showing the quantity of each lot of Product
         received,  labeled, packaged, shipped to users, and still available for
         distribution.  LILLY will inform IMMU weekly concerning the quantity of
         the Product on hand.  When an agreed minimum level of stock is reached,
         LILLY will inform IMMU  accordingly,  and IMMU will take all  necessary
         action to replenish the stock to a level deemed appropriate by IMMU.
3.5      LILLY will  distribute  Product  with the  earliest  expiry date first,
         unless  otherwise  directed by IMMU. No delivery to end users will take
         place after the expiration date of any lot of Product or after any date
         prior to that expiration  date  determined by IMMU and  communicated to
         LILLY in writing.
3.6      IMMU will be responsible for directing end users regarding
         return of the Product.  Product for whatever reason returned




                                        7





         will not be returned to saleable inventory unless agreed to by IMMU and
         promptly communicated to LILLY. Disposition of returned Product that is
         not returned to inventory shall be determined by IMMU and  communicated
         to LILLY  within  30 days.  IMMU  will  reimburse  LILLY  for the costs
         associated with this disposition.
3.7      LILLY will timely and  regularly  advise IMMU of the number of vials of
         the Product and their respective lot numbers of any expired Product and
         shall keep such  Product at IMMU's  disposal  until one month after its
         expiration  date.  After that date,  unless IMMU advises  LILLY that it
         expects to be able to extend the expiration  date, IMMU shall determine
         the manner of  disposition of such expired  Product,  which shall be at
         the expense of IMMU.
3.8      LILLY will hold the necessary  resources  available for  inspections by
         the competent  authorities of its premises and  procedures  relating to
         the Product. LILLY will assist in a manner consistent with practices in
         the industry to obtain satisfactory results of such inspections.

4.       Package  Development  and  Packaging of  the  Product  4.1  LILLY  will
         manage  the  development of  packaging  materials (including labels and
         package leaflets) with IMMU.   IMMU will provide LILLY with an approved
         packaging  file  for  each  packaging  presentation  that LILLY will be
         responsible  for  managing.   LILLY  will  develop  and  coordinate the
         creation of packaging materials according to these approved files.




                                        8





         LILLY  bears  the  responsibility  for any inconsistencies in packaging
         materials vis-a-vis the  approved packaging files.  LILLY  will provide
         specimens of packaging materials to IMMU promptly upon preparation.
4.2      LILLY shall  maintain a  sufficient  inventory  of  labelling/packaging
         materials.
4.3      IMMU will  communicate to LILLY changes to the approved  packaging in a
         timely manner and provide an update to the approved  packaging file for
         each  packaging  presentation  which is  changed.  IMMU and LILLY  will
         coordinate the introduction of the changed packaging materials into the
         market.  IMMU will reimburse  LILLY for the costs  associated  with the
         development  of  changed   packaging   materials  and  for  the  losses
         associated with the destruction of outdated packaging materials.
4.4      LILLY  will  label the vials and  assemble  the final  Product  package
         according the approved  Product  packaging file and in accordance  with
         internal  LILLY  procedures  for the GMP  packaging  of  pharmaceutical
         products.
4.5      Upon  request,  LILLY  will  provide  IMMU  copies  of  internal  LILLY
         procedures and records related to the packaging and distribution of the
         Product.
4.6      IMMU hereby  grants  LILLY the  non-exclusive  right during the term of
         this   Agreement   to  use  the   Immunomedics   logo   and  the   mark
         "Immunomedics",   in  addition  to  its  right  to  use  the  trademark
         LeukoScan(R) or such other mark(s) as IMMU shall cause to be registered
         for the Product (together with the marks for




                                        9





         any  other  products  of IMMU  which  are  included  in this  Agreement
         pursuant  to Section 10)  (collectively  the  "Marks") in the  European
         Union and such other  countries  in which  LILLY shall  distribute  the
         Product  in  connection  with,  and  confined  to the  purpose  of, the
         distribution  of the  Product.  LILLY shall use the Marks on  labeling,
         packaging and package  inserts for the Product,  and in all  literature
         related thereto,  and LILLY shall not use any other trademarks or logos
         on any labeling,  packaging,  package inserts or literature relating to
         the  Product.  LILLY  shall  comply  with and  observe  the  reasonable
         requirements  of IMMU relating to (a) the marking of the Product and/or
         its  label,  packaging,  package  insert  or  other  printed  materials
         pursuant to any and all applicable patent laws to indicate that letters
         patent have been  applied for or granted in one or more  countries  and
         (b) the use of the Marks in conformity with applicable  trademark laws.
         Prior to its use,  LILLY  shall  submit all such  labeling,  packaging,
         package inserts and related  literature to IMMU for its approval of the
         use of such  Marks.  LILLY  acknowledges  that the  Marks are and shall
         remain the  property of IMMU,  and LILLY  disclaims  any rights to such
         Marks other than the rights  granted by this  Section.  LILLY shall not
         use the Marks or any other IMMU trademark,  trade or brand name for any
         purpose other than as provided in this Section.

5.       Orders for the Product.




                                       10





5.1      The  Product  will be  offered  for  sale by IMMU in  countries  of the
         European  Union and in such other  countries as IMMU  determines in its
         sole discretion.  IMMU warrants that the Product is or will be properly
         approved for sale in each of the countries in which it is offered.
5.2      All sales and marketing efforts for the Product and all order entry are
         the  sole  responsibility  of  IMMU  and  constitute  no  part  of this
         Agreement.  IMMU warrants that, to the best of its knowledge,  each end
         user ordering and  receiving the Product meets all necessary  legal and
         regulatory requirements to do so.
5.3      All orders will be  communicated  by IMMU to LILLY's  customer  service
         representative.  LILLY  warrants  that  all  orders  received  will  be
         executed in a timely manner and in accordance with agreed cut-off times
         and service  requirements  by market,  provided the available  stock of
         Product is sufficient.
5.4      Though all reasonable efforts shall be directed towards error- free and
         reliable  communications  systems,  LILLY  shall not be liable  for any
         consequences  for delay in filling orders due to transmission  failures
         or other  disturbances  in the  communication  channels  beyond LILLY's
         normal control.

6.       Order Picking, Packing, and Shipping
6.1      Except to the extent that  specific  requirements  are included in this
         Agreement,  the  Product  will  be  supplied  to the end  users  by the
         application  of  LILLY's  standard  routines,   procedures,   modes  of
         transport, routings and time schedules,




                                       11





         all as used in or  designed  for,  and with the same degree of care and
         diligence as LILLY applies to, the  distribution of LILLY's products to
         the end  users in that  country.  The  Product  shall  not be stored or
         repacked in, or trans-shipped  from, the country of destination.  LILLY
         shall  reimburse  IMMU for any Product  damaged and not saleable due to
         improper shipment conditions by LILLY.
6.2      Orders for the Product will be processed  and  dispatched  according to
         agreed cut-off times and service requirements by market.
6.3      The  Product  will be packed in LILLY's  standard  transport  packaging
         components  and will be  shipped  to the final  destinations  under the
         shipping  conditions   established  pursuant  to  Section  3.1  and  in
         accordance  with  LILLY's  standard  procedure  for handling of chilled
         products. Shipment shall be made via DHL or other carrier acceptable to
         IMMU.
6.4      Though LILLY's  distribution  methods intend to minimize  transit times
         and to assure timely and reliable  delivery,  LILLY shall not be liable
         for any delay in  transit  due to  circumstances  beyond  its  control,
         including  (but not limited to)  modifications  in legal  requirements,
         international  regulations,  changes in  carrier's  time  schedules  or
         refusals to accept consignments or handling errors by freight carriers,
         security quarantine, inclement weather conditions, floods, earthquakes,
         wars, strikes, riots or other civil disturbances.

7.       Invoicing




                                       12





7.1      End user prices for the Product,  in the local currency of the end user
         (unless otherwise specified by IMMU), FOB Giessen, and discount schemes
         shall be determined by IMMU for each country under this Agreement.
7.2      For an initial  period to be agreed upon,  IMMU shall prepare  invoices
         for the shipments of the Product and shall  transmit the invoice to the
         end user.
7.3      Following the initial period, at IMMU's request,  LILLY will prepare an
         invoice  therefor  in Giessen at the time of each  shipment in the name
         of, and in the form approved by, IMMU.  The invoice will be included in
         the  shipment  of the  Product  to the  end  user,  and a copy  thereof
         provided to IMMU expeditiously.
7.4      The prices and  applicable  taxes and fees shown on the invoice will be
         those provided to LILLY by IMMU with the order data.
7.5      IMMU reserves the right to direct LILLY to withhold shipment to any end
         user at its sole discretion.

8.       Collection of Receivables
8.1      All  collections of amounts due under the invoices for Product  shipped
         will be made by IMMU, and LILLY shall have no responsibility therefor.

9.       Service Fee; Start-up Costs
9.1      Upon  execution of this  Agreement,  IMMU shall advance to LILLY [*] to
         cover  LILLY's  start-up  expenses   including  those  associated  with
         packaging development and systems-related  activities.  If this advance
         payment is not adequate to cover




                                       13





         all such  expenses,  then LILLY,  promptly after the third month of its
         distribution  of the Product,  shall present to IMMU adequate proofs of
         its  start-up  expenses,  and IMMU shall  reimburse  LILLY for up to an
         additional  [*]  evidenced  thereby,  for a  maximum  aggregate  amount
         thereof (including the initial advance) of [*].
9.2      IMMU shall pay LILLY a service  fee, in the manner  provided in Section
         9.6, for the  services  rendered  under this  Agreement  (the  "Service
         Fee"). The Service Fee shall consist of a Product  Packaging Fee (which
         shall be LILLY's  compensation for all services  rendered and materials
         required  in  connection  with  the  importation,   storage,  inventory
         management,  labeling and  packaging of the Product) and a Shipment Fee
         (which  shall be LILLY's  compensation  for all  services  rendered and
         materials  required in connection with the filling and shipment of each
         order of the Product (including invoicing thereof) to the end user).
9.3      The Product  Packaging  Fee shall be based on the total number of vials
         of the Product  labeled  and  packaged  annually  by LILLY  pursuant to
         orders  transmitted by IMMU to LILLY therefor.  For the first [*] vials
         labeled and packaged in a twelve month  period,  the Product  Packaging
         Fee shall be [*] per vial.  For the next [*] vials labeled and packaged
         in that twelve month period, the Product Packaging Fee shall be [*] per
         vial. For each additional vial above [*] vials labeled and packaged




                                       14





         during that twelve month period,  a Product  Packaging Fee of [*] shall
         be due.
9.4      The Shipment Fee shall be [*] for each order shipped to an end user.
9.5      Freight  costs  will be  negotiated  by LILLY  and  subject  to  IMMU's
         approval.  Freight costs will be added to the end user's invoice. LILLY
         will pay the freight  costs and charge  these back to IMMU on a monthly
         basis for reimbursement.
9.6      The Service Fee shall be payable as follows:
                  (a) At the end of each month  during the Term,  IMMU shall pay
         LILLY,  as a downpayment on the Product  Packaging Fee and the Shipment
         Fee, a Monthly  Service Fee of [*] provided that (in  consideration  of
         the payment  made by IMMU to Lilly  pursuant to Section 9.1) no Monthly
         Service  Fee shall be payable in respect of the first  three  months of
         distribution  of the  Product  pursuant  to this  Agreement,  but  such
         payments  shall be deemed to have been made for  purposes of  paragraph
         (b) below.
                  (b)  Promptly  following  the  end of  the  twelfth  month  of
         distribution  of the Product by LILLY,  and  following  the end of each
         twelve month period thereafter,  the parties shall calculate the amount
         of the Product  Packaging  Fee and the  Shipment  Fee  actually  due as
         provided in Sections 9.3 and 9.4 in respect of such  services  rendered
         during the twelve  months then ended.  If the amount of the Service Fee
         thus  calculated  exceeds the  aggregate  Monthly  Service Fee payments
         previously




                                       15





         made or deemed  made  ([*] in the first  year),  IMMU  shall  remit the
         amount of such  excess to LILLY  within  30 days of  receiving  LILLY's
         invoice therefor.
                  (c) The parties agree that  following the initial  calculation
         under  paragraph  (b)  above,  and  at  the  end  of each annual period
         thereafter, they  will  reevaluate  the  fairness  and  adequacy of the
         Monthly  Service  Fee,  the Product  Packaging  Fee  and  the  Shipment
         Fee  with a  view  to  making  such  adjustments  thereto  as  shall be
         mutually acceptable.  

10.      Addition  of  CEA-Scan(R)  as  a Product;  Other  Products
10.1     At the  request of IMMU,  Lilly  shall also provide all of the services
         required  of  it  hereunder  for  the  importation,  storage, labeling,
         packaging and  distribution  of  CEA-Scan(R),  an additional product of
         IMMU,  and the  term  "Product" shall  then  include  both LeukoScan(R)
         and CEA-Scan(R).  In such event, the Product Packaging Fee  computation
         to be made under Section 9.3 shall include the total number of vials of
         LeukoScan(R) and CEA- Scan(R), taken together,  labeled and packaged by
         Lilly.  It is also the  intention of the parties that other products of
         IMMU can be added to this Agreement in  the same manner  when  approved
         for sale in which  event the term   "Product"   would then also include
         such other products.

11.      Effectiveness, Expiration and Renewal of this Agreement
11.1     This Agreement becomes effective on the date hereof.  The
         parties  anticipate  that Lilly's  distribution  of the Product  within
         Germany will commence on or about December 1, 1997, and




                                       16





         elsewhere on  or  about  January 1,  1998,  subject  to  any  necessary
         regulatory approvals.
11.2     Subject to Article 12,  this  Agreement  shall  continue in force for a
         period  of three  years  after  its  becoming  effective,  and shall be
         automatically  renewed  unless  terminated  in writing by either party,
         giving to the other party six months notice of such non-renewal.
11.3     The validity of this Agreement, the construction and enforcement of its
         terms, and the  interpretation  of the rights and duties of the parties
         hereunder will be governed by the laws of the State of New Jersey, USA,
         excluding  those laws that relate to the choice of law.  The  exclusive
         jurisdiction and venue for any disputes arising out of or in connection
         with this Agreement will be an appropriate federal court located in the
         District  of New  Jersey,  and each party  hereby  consents to personal
         jurisdiction  in such court and consents to service of process by means
         of certified or registered mail, return receipt requested.

12.      Termination
12.1     Either party shall be entitled to  terminate  this  Agreement  upon not
         less than six  months  written  notice to the other at any time for any
         reason.
12.2     Either party shall be entitled to terminate  this  Agreement by written
         notice to the other if that other party commits any material  breach of
         any of the  provisions  of this  Agreement  and,  in  case of a  breach
         capable of remedy, fails to remedy




                                       17





         the same within  thirty days after  receipt of a written  notice giving
         full particulars of the breach and requiring it to be remedied.
12.3     Either party shall be entitled to  terminate  this  Agreement  upon not
         less than three months  written  notice to the other if there is at any
         time a  change,  either  directly  or  indirectly,  in  the  beneficial
         ownership or control of the other party to an external third party from
         that at the date of this Agreement.
12.4     IMMU shall be entitled to terminate  this  Agreement upon not less than
         three  months  written  notice  to LILLY  if IMMU  shall  enter  into a
         marketing  alliance  covering the European Union with any entity which,
         by investment or otherwise, shall become a co-venturer with IMMU.

13.      Consequences of Expiration or Termination
13.1     Upon expiration or termination of this Agreement for any reason,   IMMU
         shall be responsible for  collecting  all undelivered Product,  stocks,
         labels and packaging  materials  from LILLY within a reasonable  period
         and at IMMU's  cost, unless  agreement is reached between  the  parties
         for the  continued  distribution  of stock of the Product.
13.2     Upon  expiration or  termination of this Agreement for any reason other
         than material breach of any provisions of this Agreement by LILLY,  any
         outstanding invoices rendered by LILLY in respect of the Product and/or
         the Service Fee shall be paid




                                       18





         by  IMMU  within  thirty  (30)  days  of the  effective  date  of  such
         expiration or termination.
14.      No Assignment by IMMU or by LILLY
         This  Agreement  is  personal  to both  parties to this  agreement  and
         neither  party  may,  without  the prior  written  consent of the other
         party,  assign or dispose of or delegate  any of its rights  under this
         Agreement, or subcontract or otherwise delegate any of its obligations.

15.      Confidentiality
15.1     Each  party  ("Receiving  Party")  shall  maintain  in  confidence  all
         information heretofore or hereafter disclosed by the other ("Disclosing
         Party")  which such party knows or has reason to know are trade  secret
         and other  proprietary  information  owned by or licensed to the other,
         including, but not limited to, information relating to the Product, and
         licenses,  patents,  patent  applications,  technology or processes and
         business  plans of the  other  party,  including,  without  limitation,
         information designated as confidential in writing from one party to the
         other (all of the foregoing  hereinafter  referred to as  "Confidential
         Information"),  and shall not use such Confidential  Information except
         as  permitted  by this  Agreement  or disclose the same to anyone other
         than those of its officers,  directors or employees as are necessary in
         connection  with  such  party's  activities  as  contemplated  by  this
         Agreement.  Each party shall use the same  efforts such party would use
         to protect its own information to ensure that




                                       19





         its  officers,  directors  and  employees  do not  disclose or make any
         unauthorized  use of such  Confidential  Information.  Each party shall
         notify the other  promptly upon  discovery of any  unauthorized  use or
         disclosure of the other's Confidential Information.
15.2     The  obligation of  confidentiality  contained in this Article 15 shall
         not apply to the extent that:  (a) the  Receiving  Party is required to
         disclose  information  by  applicable  law,  regulation  or  order of a
         governmental  agency  or a court  of  competent  jurisdiction;  (b) the
         Receiving Party can demonstrate  that the disclosed  information was at
         the time of  disclosure  already in the public  domain  other than as a
         result  of  actions  or  failure  to act of the  Receiving  Party,  its
         officers,   directors  or  employees,  in  violation  hereof;  (c)  the
         disclosed  information was rightfully  known by the Receiving Party (as
         shown by its written  records)  prior to the date of  disclosure to the
         Receiving Party in connection with this Agreement; or (d) the disclosed
         information  was  received by the  Receiving  Party on an  unrestricted
         basis from a source which is not under a duty of confidentiality to the
         other party.
15.3     In the  event  that  the  Receiving  Party  shall be  required  to make
         disclosure pursuant to the provisions of Section 15.2(a) as a result of
         the  issuance  of a  court  order  or  other  government  process,  the
         Receiving Party shall promptly,  but in no event more than  forty-eight
         (48) hours after learning of




                                       20





         such court  order or other  government  process,  notify,  by  personal
         delivery  or  facsimile,   all  pursuant  to  Article  16  hereof,  the
         Disclosing Party and, at the Disclosing Party's expense,  the Receiving
         Party shall:  a) take all reasonably  necessary  steps requested by the
         Disclosing  Party to defend against the enforcement of such court order
         or other  government  process,  and b) permit the  Disclosing  Party to
         intervene and participate  with counsel of its choice in any proceeding
         relating to the enforcement thereof.
15.4     The  parties   acknowledge  that  their  failure  to  comply  with  the
         provisions  of Section  15.1 of this  Article 16 may cause  irreparable
         harm and damage to the other party for which no adequate  remedy may be
         available at law. Accordingly,  the parties agree that upon a breach by
         a party of such provisions, the non-breaching party may, at its option,
         enforce the obligations of the breaching  party under those  provisions
         by seeking equitable remedies in a court of competent jurisdiction.
15.5     The  terms  of  this  Article  15  shall  survive  the   expiration  or
         termination of the Agreement for a period of five years.

16.      Notices
16.1     Any notice required or permitted to be made or given hereunder shall be
         in writing  and shall be made or given to the other  party by  personal
         in-hand delivery; by telecopier communication; by first-class air mail,
         postage prepaid; or by air courier to the mailing address




                                       21





         or telecopier numbers set forth below:
                  Eli Lilly Deutschland GmbH
                  Teichweg 3
                  D-35396 Giessen, Germany
                  Attention:  Site Director
                  Telecopier No. 49 641 9533111

                  Immunomedics, Inc.
                  300 American Road
                  Morris Plains, NJ  07950
                  Attention:  Chief Executive Officer
                  Telecopier No. (973) 605-8311

         or to such other  address or  telecopier  numbers as either party shall
         designate by notice, similarly given, to the other party. Notices shall
         be deemed to have been  sufficiently  made or given: (i) if by personal
         in-hand delivery, when performed;  (ii) if by telecopier with confirmed
         transmission, when performed (unless after usual business hours or on a
         non-business  day, in which event,  the next  business  day);  (iii) if
         mailed,  ten (10) days  after  being  deposited  in the  mail,  postage
         prepaid;  or (iv) if by air courier,  three (3) days after  delivery to
         the air courier company.

17.      Entire Understanding
         This  Agreement  embodies  the entire  understanding  of the parties in
         respect of  distribution  of the Product and the matters  contained  or
         referred  to in  it,  and  it  overrides  or  supersedes  all  previous
         agreements  and  understandings  between the parties  made at any time,
         whether orally or in writing.

18.      Unenforceable Provision
         If any provision of this Agreement is or becomes illegal, void, invalid
         or unenforceable in whole or in part, this




                                       22




         Agreement shall continue to be valid as to its other provisions and the
         remainder of the affected provision.

AS WITNESS the parties  have caused this  Agreement  to be entered into by their
duly  authorized  representatives  on behalf of the  parties  on the date  first
before written.

Signed: /s/ David M. Goldenberg  Signed: /s/ David A. Broecker


Date:  November 24, 1997               Date:  November __, 1997
Name: David M. Goldenberg, M.D.  Name: David A. Broecker
Position: Chairman and Chief           Position: Site Director
          Chief Executive              For and on behalf of:
                   Officer                     ELI LILLY DEUTSCHLAND GmbH
For and on behalf of:
IMMUNOMEDICS, INC.





                                       23