UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                 ---------------

                                 SCHEDULE 13G/A

                    Under the Securities Exchange Act of 1934

                                (Amendment No.1)

                                Cerus Corporation
--------------------------------------------------------------------------------
                                (Name of issuer)

                         Common Stock, $0.001 par value
--------------------------------------------------------------------------------
                         (Title of class of securities)

                                   157085101
--------------------------------------------------------------------------------
                                 (CUSIP number)

                               December 31, 2001
--------------------------------------------------------------------------------
             (Date of Event which requires filing of this Statement)

                 Check the appropriate box to designate the rule
                   pursuant to which this schedule is filed:

                               /_/ Rule 13d-1 (b)
                               /X/ Rule 13d-1 (c)
                               /_/ Rule 13d-1 (d)



----------------------                                      --------------------
CUSIP No. 157085101                 13G                        Page 2 of 8 Pages
----------------------                                      --------------------


-------- -----------------------------------------------------------------------
1        NAME OF REPORTING PERSON
         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

         Deutsche Bank AG
-------- -----------------------------------------------------------------------
2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP              (a) /_/
                                                                       (b) /_/
-------- -----------------------------------------------------------------------
3        SEC USE ONLY

-------- -----------------------------------------------------------------------
4        CITIZENSHIP OR PLACE OF ORGANIZATION

         Federal Republic of Germany
---------------------------- ------ --------------------------------------------
NUMBER OF SHARES             5      SOLE VOTING POWER
                                    0
                             ------ --------------------------------------------
BENEFICIALLY                        SHARED VOTING POWER
OWNED BY                     6      105,500
                             ------ --------------------------------------------
EACH                                SOLE DISPOSITIVE POWER
REPORTING                    7      0
                             ------ --------------------------------------------
PERSON WITH                         SHARED DISPOSITIVE POWER
                             8      105,500
-------- -----------------------------------------------------------------------
9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         105,500*
-------- -----------------------------------------------------------------------
10       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
         CERTAIN SHARES                                                     /_/
-------- -----------------------------------------------------------------------
11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

         0.8%**
-------- -----------------------------------------------------------------------
12       TYPE OF REPORTING PERSON

         HC, BK, CO
-------- -----------------------------------------------------------------------

*    Included in this  figure are the  securities  reported  by  Deutsche  Asset
     Management Europe GmbH on the following cover page.

**   Included in this  percentage is the  percentage  of securities  reported by
     Deutsche Asset Management Europe GmbH on the following cover page.



----------------------                                      --------------------
CUSIP No. 157085101                 13G                        Page 3 of 8 Pages
----------------------                                      --------------------



-------- -----------------------------------------------------------------------
1        NAME OF REPORTING PERSON
         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

         Deutsche Asset Management Europe GmbH
-------- -----------------------------------------------------------------------
2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP              (a) /_/
                                                                       (b) /_/
-------- -----------------------------------------------------------------------
3        SEC USE ONLY

-------- -----------------------------------------------------------------------
4        CITIZENSHIP OR PLACE OF ORGANIZATION

         Federal Republic of Germany
---------------------------- ------ --------------------------------------------
NUMBER OF SHARES             5      SOLE VOTING POWER
                                    0
                             ------ --------------------------------------------
BENEFICIALLY                        SHARED VOTING POWER
OWNED BY                     6      105,500
                             ------ --------------------------------------------
EACH                                SOLE DISPOSITIVE POWER
REPORTING                    7      0
                             ------ --------------------------------------------
PERSON WITH                         SHARED DISPOSITIVE POWER
                             8      105,500
-------- -----------------------------------------------------------------------
 9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         105,500
-------- -----------------------------------------------------------------------
10       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
         CERTAIN SHARES                                                    /_/
-------- -----------------------------------------------------------------------
11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

         0.8%
-------- -----------------------------------------------------------------------
12       TYPE OF REPORTING PERSON

         HC
-------- -----------------------------------------------------------------------



Item 1(a).        Name of Issuer:

                  Cerus Corporation (the "Issuer").

Item 1(b).        Address of Issuer's Principal Executive Offices:

                  The address of the  Issuer's  principal  executive  offices is
2411 Stanwell Drive, Concord, CA 94520.

Item 2(a).        Name of Person Filing:

                  This statement is filed on behalf of Deutsche Bank AG ("DBAG")
and Deutsche Asset  Management  Europe GmbH ("DWS Group" and together with DBAG,
the  "Reporting  Persons").  This Schedule 13G/A is being filed pursuant to Rule
13d-2(b).

Item 2(b).        Address of Principal Business Office or, if none, Residence:

                  The principal  place of business of DBAG is  Taunusanlage  12,
60325 Frankfurt am Main, Federal Republic of Germany.

                  The   principal   place   of   business   of  DWS   Group   is
Feldbergstrasse 22, 60323 Frankfurt, Federal Republic of Germany.

Item 2(c).        Citizenship:

                  The  citizenship of the Reporting  Persons is set forth on the
applicable cover page.

Item 2(d).        Title of Class of Securities:

                  The title of the  securities  is  Common  Stock  (the  "Common
Stock").

Item 2(e).        CUSIP Number:

                  The CUSIP number of the Common Stock is set forth on the cover
page.

Item 3.           If this  statement  is filed  pursuant to Rules  13d-1(b),  or
                  13d-2(b) or (c), check whether the person filing is a:

                  (a)  /_/ Broker or dealer  registered  under section 15 of the
                       Act;

                  (b)  /_/ Bank as defined in section 3(a)(6) of the Act;

                  (c)  /_/ Insurance  Company as defined in section  3(a)(19) of
                       the Act;

                  (d)  /_/ Investment  Company registered under section 8 of the
                       Investment Company Act of 1940;

                  (e)  /_/ An investment  adviser in accordance  with Rule 13d-1
                       (b)(1)(ii)(E);

                  (f)  /_/ An  employee  benefit  plan,  or  endowment  fund  in
                       accordance with Rule 13d-1 (b)(1)(ii)(F);




                  (g)  /_/  A  parent  holding  company  or  control  person  in
                       accordance with Rule 13d-1 (b)(1)(ii)(G);

                  (h)  /_/ A savings  association  as defined in section 3(b) of
                       the Federal Deposit Insurance Act;

                  (i)  /_/ A church plan that is excluded from the definition of
                       an  investment  company  under  section  3(c)(14)  of the
                       Investment Company Act of 1940;

                  (j)  /_/ Group, in accordance with Rule 13d-1 (b)(1)(ii)(J).

                  If this  statement is filed  pursuant to Rule 13d-1 (c), check
this box. /X/

Item 4.           Ownership.

                  (a)  Amount beneficially owned:

                       Each of the  Reporting  Persons  owns the  amount  of the
                  Common Stock as set forth on the applicable cover page.

                  (b)  Percent of class:

                       Each of the Reporting  Persons owns the percentage of the
                  Common Stock as set forth on the applicable cover page.

                  (c)  Number of shares as to which such person has:

                       (i) sole power to vote or to direct the vote:

                           Each of the  Reporting  Persons has the sole power to
                        vote or to direct  the vote of the  Common  Stock as set
                        forth on the applicable cover page.

                       (ii) shared power to vote or to direct the vote:

                           Each of the Reporting Persons has the shared power to
                        vote or to direct  the vote of the  Common  Stock as set
                        forth on the applicable cover page.

                       (iii) sole power to dispose or to direct the  disposition
                             of:

                           Each of the  Reporting  Persons has the sole power to
                        dispose or direct the disposition of the Common Stock as
                        set forth on the applicable cover page.

                       (iv) shared power to dispose or to direct the disposition
                            of:


                           Each of the Reporting Persons has the shared power to
                        dispose or direct the disposition of the Common Stock as
                        set forth on the applicable cover page.

Item 5.           Ownership of Five Percent or Less of a Class.

                  If this statement is being filed to report the fact that as of
the date hereof the reporting persons have ceased to be the beneficial owners of
more than five percent of the class of securities check the following [x].

Item 6.           Ownership  of More than  Five  Percent  on  Behalf of  Another
                  Person.

                  Not applicable.

Item 7.           Identification  and  Classification  of the  Subsidiary  Which
                  Acquired the Security  Being Reported on by the Parent Holding
                  Company.

                  The following are subsidiaries of the Reporting  Persons which
hold Common Stock included in the figures on the cover page: DWS Investment GmbH
and DWS Investment S.A. Luxemburg.

Item 8.           Identification and Classification of Members of the Group.

                  Not applicable.

Item 9.           Notice of Dissolution of Group.

                  Not applicable.

Item 10.          Certification.

                  By signing  below I certify  that, to the best of my knowledge
and belief, the securities  referred to above were not acquired and are not held
for the purpose of or with the effect of changing or influencing  the control of
the  issuer  of the  securities  and  were  not  acquired  and are  not  held in
connection  with or as a participant in any  transaction  having that purpose or
effect.




                                    SIGNATURE

     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information  set forth in this statement is true,  complete and
correct.

Dated:  February 12, 2002



                                 DEUTSCHE BANK AG



                                 By: /s/ Jeffrey A. Ruiz
                                    ---------------------------
                                     Name:   Jeffrey A. Ruiz
                                     Title:  Vice President



                                 By: /s/ Margaret M. Adams
                                    ---------------------------
                                     Name:   Margaret M. Adams
                                     Title:  Director







                Consent of Deutsche Asset Management Europe GmbH


     The undersigned agrees that the Schedule 13G/A executed by Deutsche Bank AG
to which this statement is attached as an exhibit is filed on behalf of Deutsche
Bank AG and Deutsche Asset  Management  Europe GmbH pursuant to Rule 13d-1(k)(1)
of the Securities Exchange Act of 1934.

Dated:  February 12, 2002



                                   DEUTSCHE ASSET MANAGEMENT EUROPE GMBH



                                   By: /s/ Dr. Dieter Eisele
                                      ---------------------------
                                       Name: Dr. Dieter Eisele
                                       Title: Global Head of Compliance



                                   By: /s/ Michaela Bundschuh
                                      ---------------------------
                                       Name: Michaela Bundschuh
                                       Title: Head Position Monitoring