Exhibit 99.1


Antigenics Reports Third Quarter 2004 Financial Results and Recent Highlights

     NEW YORK--(BUSINESS  WIRE)--Oct.  19,  2004--Antigenics Inc. (NASDAQ: AGEN)
reported  results  today for the quarter ended  September 30, 2004.  The company
incurred a net loss  attributable to common  stockholders  of $18.7 million,  or
$0.41 per share,  basic and  diluted,  for the third  quarter  of 2004.  This is
compared  with a net loss  attributable  to  common  stockholders  in the  third
quarter  of 2003 of $17.8  million,  or $0.45  per  share,  basic  and  diluted.
Research and  development  costs were $9.8 million in the third quarter of 2004,
compared  with  $13.2  million  for the same  period in 2003.  The  decrease  in
research  and  development  costs  were  primarily  related  to a  reduction  in
clinical-related  costs due to the completion of enrollment in the Phase 3 renal
cell  carcinoma  trial.  For the quarter ended  September 30, 2004,  the company
incurred a loss from continuing  operations of $18.5 million or $0.41 per share,
basic and diluted.  This is compared with a loss from  continuing  operations in
the  third  quarter  of 2003 of $17.8  million  or $0.45  per  share,  basic and
diluted.  Cash,  cash  equivalents  and  short-term  investments  equaled $106.3
million on September 30, 2004.
     "We  continue  to make  important  strides in the  advancement  of our lead
product  candidate  Oncophage,"  said Garo H. Armen,  PhD,  chairman  and CEO of
Antigenics.  "Our  kidney  cancer  trial is on  target  with our  timelines  and
anticipated to reach the required number of events in the first half of 2005. As
the  culmination of our efforts over the past 10 years, we are very much looking
forward to delivering a significant  breakthrough  for patients  suffering  from
cancer."

     Recent Highlights

     --   The  manufacturing  success rate for the Phase 3 trial of Oncophage(R)
          (HSPPC-96) in metastatic melanoma has improved significantly,  from 69
          percent to 83 percent, subsequent to the implementation of an improved
          process for production of vaccine from metastatic tissue.

     --   The  Phase  3  metastatic  melanoma  trial  has  now  been  closed  to
          enrollment. Antigenics expects results to be analyzed and announced in
          the second quarter of 2005.

     --   In September,  Alastair J. J. Wood,  MD, was appointed to  Antigenics'
          board of directors.  Dr. Wood brings more than 20 years of health care
          and pharmaceutical experience.  Most recently, he was the drug therapy
          editor of the New England  Journal of Medicine from 1992 to 2004,  and
          is  currently  a  member  of the US  Food  and  Drug  Administration's
          nonprescription drug advisory committee.

     --   In July,  Roman M. Chicz,  PhD, was appointed as senior vice president
          of research and preclinical development.

     Conference Call Information

     Antigenics  executives  will host a conference call at 11:00 a.m. ET today.
To  access  the  live  call,  dial   888.271.9082   (domestic)  or  706.679.7741
(international);  the access code is 1430172.  The call will also be webcast and
will be accessible from the company's website at www.antigenics.com/webcast/.  A
replay will be available approximately two hours after the call through midnight
ET on  November  2,  2004.  The  replay  number is  800.642.1687  (domestic)  or
706.645.9291  (international),  and the access code is 1430172.  The replay will
also be available on the  company's  website  approximately  two hours after the
live call.

     About Antigenics

     Antigenics  is  working  to  develop  personalized  immunotherapeutics  and
revolutionary  treatments  for  cancers,   infectious  diseases  and  autoimmune
disorders.  The company's  lead product  candidate is  Oncophage,  a late-stage,
personalized  cancer vaccine being evaluated in several  indications,  including
renal  cell  carcinoma  and  metastatic  melanoma.  Antigenics'  portfolio  also
includes  AG-858,  a  personalized   cancer  vaccine  in  Phase  2  development;
Aroplatin(TM), a Phase 2 liposomal chemotherapeutic;  and AG-702/AG-707, a Phase
1 genital herpes program.  For more information about  Antigenics,  please visit
www.antigenics.com.

     This  press  release   contains   forward-looking   statements,   including
statements  regarding the ability to deliver a significant  benefit for patients
suffering  from cancer,  the timing of when the requisite  number of events will
occur in the renal cell  carcinoma  trial,  and the timing for the  analysis  on
announcement of the Phase 3 metastatic melanoma. These statements are subject to
risks and  uncertainties  that could cause actual  results to differ  materially
from  those   projected   in  these   forward-looking   statements.   Risks  and
uncertainties  include,  among others, the results from ongoing Phase 3 clinical
trials;  the need for and extent of additional  clinical trials;  the regulatory
regime  in which the  company  operates;  and the  factors  described  under the
heading  "Risk  Factors"  in the  Amendment  No. 1 to Form S-3 as filed with the
Securities and Exchange  Commission on September 29, 2004.  Antigenics  cautions
investors not to place considerable  reliance on the forward-looking  statements
contained in this press release.  These  statements speak only as of the date of
this document,  and Antigenics  undertakes no obligation to update or revise the
statements.  All  forward-looking  statements  are expressly  qualified in their
entirety  by this  cautionary  statement.  Antigenics'  business  is  subject to
substantial  risks and  uncertainties,  including those identified  above.  When
evaluating  Antigenics'  business and securities,  investors should give careful
consideration to these risks and uncertainties.


                   Summary Consolidated Financial Information

              Condensed Consolidated Statements of Operations Data
                      (in thousands, except per share data)
                                   (unaudited)

                               Three months ended  Nine months ended
                                   September 30,      September 30,
                                 2004      2003      2004      2003
                               --------- --------- --------- ---------
                                                      
Revenue                        $    282  $      -  $    579  $    928

Operating expenses:
Cost of Sales                         5         -         5
Research and development          9,816    13,201    31,641    35,079
General and administrative        6,317     4,745    18,439    14,699
Acquired in-process research
 and development                  2,888               2,888
                               --------- --------- --------- ---------
Operating loss                  (18,744)  (17,946)  (52,394)  (48,850)

Other income, net                   269       141       647       792

                               --------- --------- --------- ---------
Loss from continuing
 operations                     (18,475)  (17,805)  (51,747)  (48,058)

Income from discontinued
 operations (including gain on
 disposal of $14 million in
 2004)                                -        37    13,034       180

                               --------- --------- --------- ---------
Net loss                        (18,475)  (17,768)  (38,713)  (47,878)

Dividends on Series A
 convertible preferred stock       (197)      (26)     (593)      (26)

                               --------- --------- --------- ---------
Net loss attributable to
 common stockholders           $(18,672) $(17,794) $(39,306) $(47,904)
                               ========= ========= ========= =========

Per common share data:
Loss from continuing
 operations, basic
 and diluted                   $  (0.41) $  (0.45) $  (1.18) $  (1.24)
Net loss attributable to
 common stockholders, basic
 and diluted                   $  (0.41) $  (0.45) $  (0.89) $  (1.23)
Weighted average number of
 common shares outstanding,
 basic and diluted               45,360    39,474    44,405    38,821



                    Condensed Consolidated Balance Sheet Data
                                 (in thousands)
                                   (unaudited)

                               September           December
                                  30,                 31,
                                 2004                2003
                               ----------          ----------
                                                  
Cash, cash equivalents and
 short-term investments        $106,267            $ 89,478
Total assets                    152,091             140,080
Total stockholders' equity      123,296             105,246


    CONTACT: Antigenics Inc.
             Investor Relations:
             Jack Howarth, 212-994-8244
             jhowarth@antigenics.com
             or
             Sunny Uberoi, 212-994-8206
             suberoi@antigenics.com