SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                    ________

                                    FORM 6-K

                        REPORT OF FOREIGN PRIVATE ISSUER
                      PURSUANT TO RULE 13A-16 OR 15D-16 OF
                       THE SECURITIES EXCHANGE ACT OF 1934

                         For the month of February, 2003

                                  Serono S.A.
                              -------------------
                              (Registrant's Name)

                            15 bis, Chemin des Mines
                                 Case Postale 54
                                CH-1211 Geneva 20
                                  Switzerland
                    ----------------------------------------
                    (Address of Principal Executive Offices)

                                    1-15096
                              ---------------------
                              (Commission File No.)

     (Indicate  by  check  mark whether the registrant files or will file annual
reports  under  cover  of  Form  20-F  or  Form  40-F.)

     Form  20-F  X  Form  40-F
                ---            ---

     (Indicate  by  check  mark  if the registrant is submitting the Form 6-K in
paper  as  permitted  by  Regulation  S-T  Rule  101  (b)(1).)  ______

     (Indicate  by  check  mark  if the registrant is submitting the Form 6-K in
paper  as  permitted  by  Regulation  S-T  Rule  101  (b)(7).)   ______

     (Indicate  by  check  mark  whether  the  registrant  by  furnishing  the
information contained in this form is also thereby furnishing the information to
the  Commission  pursuant to Rule 12g3-2(b) under the Securities Exchange Act of
1934.)

     Yes      No  X
         ---     ---

     (If  "Yes"  is  marked,  indicate  below  the  file  number assigned to the
registrant  in  connection  with  Rule  12g3-2(b):  82-______)



                                                                          SERONO


MEDIA RELEASE


FOR IMMEDIATE RELEASE
---------------------


                  SERONO SUBMITS APPLICATION FOR EUROPEAN UNION
                      APPROVAL OF RAPTIVA(TM) FOR PSORIASIS


GENEVA,  SWITZERLAND  -  FEBRUARY  26, 2003 - SERONO S.A. (VIRT-X: SEO AND NYSE:
SRA)  Serono  announced  today  that  it has submitted a Marketing Authorization
Application  (MAA)  to  the  European  Agency  for  the  Evaluation of Medicinal
Products  (EMEA)  for  Raptiva(TM) (efalizumab) for the treatment of adults with
moderate-to-severe  psoriasis.  The  EMEA  has confirmed that the application is
valid,  and  that  the  regulatory  procedure  has  commenced.

"With  the  filing of Raptiva in Europe, Serono is one step nearer to entering a
new  therapeutic  area,  "  said  Ernesto  Bertarelli,  Serono's Chief Executive
Officer.  "The treatment advance represented by Raptiva will address many of the
unmet  needs  of  people  with  psoriasis."

This  submission  is  based  on  efficacy  and safety studies in more than 2,100
patients  with  psoriasis.  In  these  clinical  trials, Raptiva(TM) showed fast
onset  of  clinical  response  -  as  early as two weeks - and control of plaque
psoriasis  over  a  one  year  period  of  treatment.

The  company plans to submit the applications for the marketing authorization of
Raptiva(TM)  with  Canadian, Australian and Swiss authorities by the end of this
quarter.

Serono has the rights to develop and market Raptiva(TM) worldwide outside of the
United  States  and Japan. Development and marketing rights in the United States
remain  with Genentech Inc. (NYSE:DNA) and its U.S. partner XOMA (Nasdaq: XOMA),
who  filed  a Biologics License Application (BLA) with the FDA in December 2002.

ABOUT  RAPTIVA(TM)

Raptiva(TM), a recombinant humanized monoclonal antibody, is designed to inhibit
the  adhesion  of T-lymphocytes to other cell types by inhibiting the binding of
LFA-1 to ICAM-1. This mechanism of action has a number of effects depending upon
the  cell  type, which include: (1) inhibition of T-lymphocyte interactions with
tissue-specific  cells, (2) inhibition of T-lymphocyte migration, (3) inhibition
of  T-lymphocyte activation, proliferation and cytokine release. In the clinical
Phase  III  studies,  Raptiva(TM)  was  given  as  a  once-a-week  subcutaneous
injection.  Raptiva(TM)  is currently in Phase II trials in Rheumatoid Arthritis
and is being also evaluated for the treatment of Psoriatic Arthritis.



                                     -more-



ABOUT  SERONO

Serono  is  a  global  biotechnology  leader.  The  Company  has six recombinant
products  on  the  market,  Gonal-F(R),  Luveris(R),  Ovidrel(R)/Ovitrelle(R),
Rebif(R),  Serostim(R) and Saizen(R) (Luveris(R) is not approved in the USA). In
addition  to  being  the  world leader in reproductive health, Serono has strong
market  positions  in  neurology,  metabolism and growth. The Company's research
programs  are  focused  on  growing  these  businesses  and  on establishing new
therapeutic  areas.  Currently,  there  are  over  30  projects  in development.

In  2002,  Serono  achieved  worldwide  revenues  of US$1.546 billion, and a net
income  of  US$321  million,  making it the third largest biotech company in the
world.  The  Company operates in 45 countries, and its products are sold in over
100  countries. Bearer shares of Serono S.A., the holding company, are traded on
the  virt-x  (SEO) and its American Depositary Shares are traded on the New York
Stock  Exchange  (SRA).


                                       ###
Some  of  the  statements  in  this  press  release  are  forward  looking. Such
statements  are inherently subject to known and unknown risks, uncertainties and
other  factors  that  may  cause  actual results, performance or achievements of
Serono  S.A.  and  affiliates  to be materially different from those expected or
anticipated  in  the  forward-looking statements. Forward-looking statements are
based on Serono's current expectations and assumptions, which may be affected by
a  number  of  factors, including those discussed in this press release and more
fully  described  in  Serono's  Annual  Report  on Form 20-F filed with the U.S.
Securities  and  Exchange  Commission on May 21 2002.  These factors include any
failure  or  delay  in  Serono's ability to develop new products, any failure to
receive  anticipated  regulatory  approvals,  any  problems  in  commercializing
current  products  as  a  result of competition or other factors, our ability to
obtain  reimbursement  coverage  for  our  products,  and government regulations
limiting  our  ability  to  sell  our  products. Serono has no responsibility to
update the forward-looking statements contained in this press release to reflect
events  or  circumstances  occurring  after  the  date  of  this  press release.
                                       ###



FOR MORE INFORMATION, PLEASE CONTACT:

  SERONO IN GENEVA, SWITZERLAND:
  MEDIA  RELATIONS:                  INVESTOR RELATIONS:
  Tel:  +41-22-739 36 00             Tel:  +41-22-739 36 01
  Fax:  +41-22-739 30 85             Fax:  +41-22-739 30 22
  http://www.serono.com              Reuters:  SEOZ.VX / SRA.N
  ---------------------              Bloomberg:  SEO VX / SRA US

  SERONO, INC., ROCKLAND, MA
  MEDIA  RELATIONS:                  INVESTOR  RELATIONS:
  Tel.  +1 781 681 2340              Tel.  +1 781 681 2552
  Fax:  +1 781 681 2935              Fax:  +1 781 681 2912
  http://www.seronousa.com
  ------------------------


  GENENTECH:

  MEDIA CONTACT:

  Tara Cooper:  +1 (650) 225-5505

  INVESTOR CONTACT:

  Kathee Littrell:   +1 (650) 225-1034

  www.gene.com
  ------------



                                      -end-



                                   SIGNATURES

     Pursuant  to  the  requirements of the Securities Exchange Act of 1934, the
registrant  has  duly  caused  this  report  to  be  signed on its behalf by the
undersigned,  thereunto  duly  authorized.



                                              SERONO S.A.
                                              a Swiss corporation
                                              (Registrant)



February 26, 2003                       By:   /s/  Allan Shaw
                                              --------------------------------
                                              Name:  Allan Shaw
                                              Title: Chief Financial Officer