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 March, 2004

                                  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-______)



                                                               [GRAPHIC OMITTED]
                                                                          Serono

Media Release


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



      RAPTIVA(R) (EFALIZUMAB) RECEIVES APPROVAL FOR MODERATE-TO-SEVERE PLAQUE
                            PSORIASIS IN SWITZERLAND


                      First approval of Raptiva for Serono

GENEVA,  SWITZERLAND  -  MARCH  16,  2004  -  Serono (virt-x: SEO and NYSE: SRA)
announced  today  that  Raptiva(R) (efalizumab) has been approved by Swissmedic,
the  Swiss  regulatory  authority,  for  the  treatment  of  adult patients with
moderate-to-severe  plaque  psoriasis.  Raptiva  is the first biological therapy
for  psoriasis  that  is  approved  in  Switzerland.  It  is designed to provide
continuous  control of the disease and can be self-administered by patients as a
single,  once-weekly,  subcutaneous  injection.

"We  are  delighted  that our home territory of Switzerland is the first country
outside  of  the US to give approval to Raptiva," said Ernesto Bertarelli, Chief
Executive  Officer  of  Serono.  "We  look  forward to bringing Raptiva to other
patients,  who  deserve  a  new  treatment  for  this  serious  condition."

"Dermatologists  and  patients  have been frustrated with the treatments that we
have  had available to us," said Prof Jean-Hilaire Saurat, Chairman, Dermatology
Department,  University Hospital of Geneva and current President of the European
Academy of Dermatology and Venerology (EADV).  "The new biological agents enable
a  new  age  in treatment for people with psoriasis.  These give us new hope for
providing  patients  with  improved  therapies that will be easier to manage and
will  provide  effective  and  safe,  long-term  control  of  their  condition."

"Since  there is no cure for psoriasis, people have to manage their disease over
their  lifetime.  That  means  that  amongst  the  two percent of the population
affected  by  psoriasis,  many patients suffer from reduced daily activities and
quality  of  life, even up to a total inability to work. It is a major challenge
to  find a treatment that works, has a favorable track record for safety and can
be  easily  integrated  into a patient's life." said Kurt Scherrer, President of
the  Swiss  Psoriasis  and Vitiligo Association (SPVG)*.  "Biological treatments
like  Raptiva offer a new treatment option for psoriasis which successfully meet
this  challenge  and give patients, especially in more severe cases, a chance to
live  a  more  normal  life."

Serono plans to launch Raptiva in Switzerland during the second quarter of 2004.

*  (For  more  information  you  can  visit  the new SPVG-homepage: www.spvg.ch)
                                                                    -----------


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ABOUT  RAPTIVA(R)

Raptiva(R)  is  a  humanized  therapeutic  antibody  designed to selectively and
reversibly  block  the  activation, reactivation and trafficking of T-cells that
lead  to  the  development  of  psoriasis symptoms. In clinical studies, Raptiva
demonstrated  a  rapid  onset  of action in the reduction of symptoms associated
with  psoriasis,  in  some  patients  within four weeks of initiating treatment.
Raptiva  is  administered  once  weekly  via  subcutaneous  injection and can be
self-administered  by  patients  at  home.

Serono  has the rights to develop and market Raptiva(R) 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).
Raptiva  has been available since November 2003 in the U.S. for the treatment of
moderate-to-severe  chronic  plaque psoriasis in adults aged 18 or older who are
candidates  for  systemic  therapy  or  phototherapy.  Switzerland  is the first
country  outside  of  the  U.S.  to  approve  Raptiva.

More  than  3,000  patients have been studied with Raptiva to date, creating the
largest  existing  database  of  patients  treated  with  a biologic therapy for
psoriasis.


ABOUT  PSORIASIS

Psoriasis  is  a  T-cell  mediated  disease  which  occurs  when skin cells grow
abnormally,  resulting in thick, red, scaly, inflamed patches. Plaque psoriasis,
the most common form of the disease is characterized by inflamed patches of skin
("lesions")  topped with silvery white scales. Psoriasis can be limited to a few
spots  or  involve  extensive  areas of the body, appearing most commonly on the
scalp,  knees, elbows and trunk. Although it is highly visible, psoriasis is not
a  contagious  disease.  While  there  are a number of medications that may help
control  the  symptoms  of  psoriasis,  there  currently  is  no  known  cure.

ABOUT  SERONO

Serono  is  a  global  biotechnology  leader.  The Company has seven recombinant
products,  Rebif(R),  Gonal-F(R),  Luveris(R),  Ovidrel(R)/Ovitrelle(R),
Serostim(R), Saizen(R) and Zorbtive(TM) (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 approximately 30 ongoing development
projects.

In  2003,  Serono  achieved  worldwide revenues of US$2,018.6 million, and a net
income  of  US$390.0 million, making it the third largest biotech company in the
world. Its products are sold in over 90 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).




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                                       ###

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 April 17, 2003.  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
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                                   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)



March 16, 2004                     By:   /s/ Allan Shaw
                                         -------------------
                                         Name:  Allan Shaw
                                         Title: Chief Financial Officer