Exhibit 4.8 [ + ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT,
MARKED BY BRACKETS,  HAS BEEN OMITTED AND FILED  SEPARATELY  WITH THE SECURITIES
AND EXCHANGE  COMMISSION PURSUANT TO RULE24B-2 OF THE SECURITIES EXCHANGE ACT OF
1934, AS AMENDED.

                                                                     Exhibit 4.8

                 ASSIGNMENT AGREEMENT BETWEEN DR. LELAND SHAPIRO
                            AND CAVIT SCIENCES, INC.

     WHEREAS,  LELAND  SHAPIRO,   residing  at  [+++++++++++],   an  individual,
(hereinafter  referred as "ASSIGNOR") has invented a certain invention  entitled
"METHODS AND  COMPOSITIONS  FOR TREATMENT OF VIRAL  INFECTIONS",  for which a US
Utility  application was filed in the United States Patent and Trademark  Office
on DECEMBER 12, 2005,  assigned  SERIAL NUMBER  [+++++++++]  and for which a PCT
application  was filed in the  United  States  Patent  and  Trademark  Office on
DECEMBER  12,  2005,   assigned  SERIAL  NUMBER   [+++++++++++]   (collectively,
"INVENTION") and has a fifty-percent interest in said INVENTION;

     WHEREAS,  CAVIT  SCIENCES,  INC. a company  having its  principal  place of
business at 100 East Linton  Blvd.,  Suite 106B,  Delray  Beach,  Florida  33483
(referred to hereinafter as  "ASSIGNEE"),  its  successors,  assigns,  and legal
representatives,  desires to obtain Assignor's entire right,  title and interest
in, to and under said INVENTION,  and in, to and under Letters Patent or similar
legal protection to be, or having been,  obtained therefore in the United States
of America,  its territorial  possessions  and in any and all countries  foreign
thereto;

     WHEREAS,  Assignor  agrees to assign his patent  application  rights to the
INVENTION to Assignee;

     NOW,  THEREFORE,  for good and valuable  consideration,  the sufficiency of
which is hereby acknowledged, the parties agree as follows:

     1.  Assignor  agrees  to  assign  the above  patent  application  rights to
Assignee and execute assignment documents in the forms as attached in Appendix A
and B. It is understood that Assignee has done its due diligence with respect to
the INVENTION and that the Assignor makes no representation or warranties of any
kind  regarding the  INVENTION,  except that he has not made or entered into any
prior agreements that would conflict with the above assignment.

     2.  Assignor  agrees  to  assign  the above  patent  application  rights to
Assignee once this  Assignment  Agreement has been executed by both the Assignor
and Assignee and the initial $10,000  payment  described below has been received
by the Assignor.

     3.  Assignor  agrees  to keep  the  Information,  as  hereinafter  defined,
confidential  and will not, except as required by applicable law,  regulation or
legal  process,   without   Assignee's  prior  written  consent,   disclose  any
Information  to a third  party and will not use any  Information  other  than in
connection  with and/or  promotion  of  Assignee's  business.  In the event that
Assignor is requested pursuant to, or required by, applicable law, regulation or

legal process to disclose any of the Information,  Assignor will notify Assignee
promptly  so that  Assignee  may seek a  protective  order or other  appropriate
remedy,  or waive  compliance  with the terms herein.  In the event that no such
protective  order or other remedy is obtained,  or that  Assignee does not waive
compliance, in a reasonable period of time, Assignor shall be free to respond to
the legal process.  Information  shall mean any testing results,  documentation,
literature,  reports technology or any other proprietary  information related to
said Invention.

     4. Assignee agrees to pay Assignor a total of $30,000 as follows:

     1)   $10,000 upon execution of this Assignment Agreement;

     2)   $10,000 on or before December 10, 2006

     3)   $10,000 on or before) May 10, 2007

     5. Assignee agrees not to assign,  license or otherwise  transfer or permit
the   exploitation   of   (collectively,   "Transfer")   any   interest  in  the
above-mentioned  patent  applications,  assigned by Assignor to Assignee , until
Assignor  has been paid the $30,000 in full.  In the event of a Transfer of such
interest by Assignee in violation of this provision,  then the unpaid balance of
the $30,000 shall become immediately due and payable to assignor.

     6. Assignee agrees that the application rights will be immediately assigned
back to Assignor,  at  Assignee's  sole  expense,  including  any of  Assignor's
reasonable attorney's fees to effect or enforce such re-assignment,  if Assignee
defaults in payments in accordance with the terms herein. .

     7.  This   Assignment   Agreement  shall  be  governed  by  and  construed,
interpreted  and enforced in  accordance  with the internal laws of the State of
Colorado.

     8. All notices and other  communications  required or permitted shall be in
writing  and shall be deemed  given or  delivered  when  sent by  registered  or
certified mail to the party's address written above.

     9.  Any  controversy,  dispute  or  claim  arising  under  this  Assignment
Agreement  shall be settled by  Arbitration  conducted in Denver,  Colorado by a
single  Arbitrator  in  accordance  with the rules of the  American  Arbitration
Association as then in effect.  The decision or award of the Arbitrator shall be
final and binding on the parties  and there shall be no appeal  therefrom  other
than gross negligence.  The prevailing party in any arbitration or litigation to
enforce any right or remedy under this Assignment agreement shall be entitled to
recover from the other party all  reasonable  costs and  expenses in  connection
with such action, including reasonable attorney's fees.

     IN WITNESS  WHEROF,  the parties  hereto have caused this  Agreement  to be
executed on this 7 day of July, 2006.

Leland Shapiro                                     Cavit Sciences, Inc.


/s/ Leland Shapiro                                 /s/ Colm J. King
- ---------------------------                        ---------------------------
By: Leland Shapiro                                 By: Colm J King
                                                   Its: CEO