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 June, 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-______)



                                                                          SERONO

Media Release

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


           CHMP GIVES POSITIVE OPINION TO PSORIASIS PRODUCT RAPTIVA(R)


              European Commission Marketing Authorisation expected
                          during third quarter of 2004


GENEVA,  SWITZERLAND  -  JUNE  24,  2004  -  Serono  (virt-x: SEO and NYSE: SRA)
announced  today  that  it  has  received  a unanimous positive opinion from the
Committee  of  Medicinal  Products for Human Use (CHMP) recommending approval of
its  psoriasis product Raptiva(R) (efalizumab).  The positive recommendation has
been  issued  during  this  week's meeting of the CHMP, the scientific committee
that  evaluates  medicinal  products  for  human  use  within  the  EU since the
accession  of  the  10  new  member  states  on  May  1,  2004.

Raptiva  received the CHMP positive opinion for the 'Treatment of adult patients
with  moderate to severe chronic plaque psoriasis who have failed to respond to,
or who have a contraindication to, or are intolerant to other systemic therapies
including  cyclosporine,  methotrexate  and  PUVA'.  Serono expects the European
Commission's  Marketing  Authorisation during the third quarter of this year and
plans  to initiate the launch of the product in EU countries shortly thereafter.

"The  CHMP's  positive  opinion  is  very good news for people with psoriasis as
Raptiva  can  offer  an  effective  therapy  to those whose needs are not met by
current treatments," said Ernesto Bertarelli, Chief Executive Officer of Serono.
"This  indication  is  entirely  consistent with the results of our CLEAR study,
which  showed  that Raptiva is safe and efficacious in this significant group of
high-needs  patients."

Serono received authorisation for Raptiva in Switzerland in March and in
Argentina last month and is awaiting the outcomes of marketing applications in a
number of other territories for which it is responsible.  Raptiva has also been
available since November 2003 in the U.S., where it is marketed by Genentech for
the treatment of moderate to severe chronic plaque psoriasis in adults aged 18
or older who are candidates for systemic therapy or phototherapy.


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Serono  will  hold  a conference call for investors on June 25, 2004 starting at
3:00  pm  CET  during  which  its  management  will  discuss the CHMP opinion on
Raptiva.  Details  of the conference call are available at the end of this press
release.

Additionally JPMorgan will host an Investor Day on July 7, 2004 in Geneva
starting at 2:00 pm CET during which Serono management will provide an update
for investors on Raptiva. This JPMorgan event will also be relayed by live audio
webcast, which will be accessed through the following link:
http://events.genesysrichmedia.com/JPMORGAN/2004/07/07/.


                                       ***


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. Raptiva is designed to be
administered once weekly via subcutaneous injection and can be self-administered
by patients at home.
Serono has the rights to develop and market Raptiva worldwide outside of the
United States and Japan. On March 16, 2004, Serono announced approval for
Raptiva in Switzerland for adult patients with moderate-to-severe plaque
psoriasis. Serono announced in February 2003 that it had submitted a Marketing
Authorization Application (MAA) to the European Agency for the Evaluation of
Medicinal Products (EMEA) for European Union Approval of RAPTIVA in psoriasis.
Development and marketing rights in the United States remain with Genentech Inc.
(NYSE:DNA) and its U.S. partner XOMA (Nasdaq: XOMA).
More than 3,500 patients in the U.S. and Europe have been included in Raptiva
trials to date, creating the largest existing database of patients taking part
in studies with a biological 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.


BACKGROUND  MATERIAL
For  free  B-roll,  video and other content about Raptiva, psoriasis and Serono,
please  visit  the  Serono  Media  Center  www.thenewsmarket.com/Serono. You can
                                           ----------------------------
download  print-quality images and receive broadcast-standard video digitally or
by  tape  from  this  site.  Registration  and  video  is  free  to  the  media.

CONFERENCE  CALL
Serono  will  hold  a conference call for investors on June 25, 2004 starting at
3:00  pm  CET  during  which  its  management  will  discuss the CHMP opinion on
Raptiva.  To  join  the  telephone conference please dial 412 858 4600 (from the
US),  091 610 5600 (from Switzerland), 0207 1070611 (from the UK) and +41 91 610
5600  (from elsewhere).  Telephone playback will be available one hour after the
conference  call  and  until close of business 5.00 pm ET on July 2nd, 2004.  To
access  this  playback please dial the following numbers: 412 3170 088 (from the
US), 091 612 4330 (from Switzerland), 0207 866 4300 (from the UK) and +41 91 612
4330  (from  elsewhere) and enter the PIN code 149# from a touch tone telephone.

The conference call will also be relayed by live audio webcast, which interested
parties  may access via Serono's Corporate home page, www.serono.com.  A link to
the  webcast  will  be  provided  immediately  prior  to  the  event and will be
available  for  replay  following  the  event.


                                                                             2/3

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).

                                       ###

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 March 25, 2004. 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:
 CORPORATE MEDIA RELATIONS:  CORPORATE 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
 www.serono.com              Reuters: SEO.VX / SRA.N
 --------------              Bloomberg: SEO VX / SRA US
                             INVESTOR RELATIONS, USA
                             Tel:  +1 781 681 2552
                             Fax:  +1 781 681 2912


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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)



June 24, 2004                      By:  /s/  Francois Naef
                                        -----------------------
                                        Name:  Francois Naef
                                        Title: Secretary