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                                                              FILE NO. 333-59997
                                                                  RULE 424(B)(3)
 
                             PROSPECTUS SUPPLEMENT
       (TO THE PROSPECTUS AND PROSPECTUS SUPPLEMENT DATED JULY 30, 1998)
                                     PROSPECTUS NUMBER: 1808
 
 
                           MERRILL LYNCH & CO., INC.
                          MEDIUM-TERM NOTES, SERIES B
                   DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
 
                                FIXED RATE NOTES
 
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<CAPTION>
 
<S>                      <C>
 
PRINCIPAL AMOUNT:        $68,000,000
 
 
CUSIP NUMBER:            59018S V43
 
 
INTEREST RATE:           5.07000%
 
 
ORIGINAL ISSUE DATE:     January 11, 1999
 
 
STATED MATURITY DATE:    February 4, 2000
 
 
INTEREST PAYMENT DATES:  Each May 15th and November 15th, commencing on May 15, 1999 to Maturity,
                         subject to Following Business Day Convention.
 
 
REPAYMENT AT THE OPTION
OF THE HOLDER:           The Notes cannot be repaid prior to the Stated Maturity Date.
 
 
REDEMPTION AT THE OPTION
OF THE COMPANY:          The Notes cannot be redeemed prior to the Stated Maturity Date.
 
 
FORM:                    The Notes are being issued in fully registered book-entry form.
 
 
TRUSTEE:                 The Chase Manhattan Bank
 
 
DATED:                   January 4, 1999
 
 
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