MERCK's VARIVAX APPROVAL RECOMMENDATION INCLUDES CONCERN ABOUT LONG-TERM EFFICACY; CDC IS PLANNING SURVEILLANCE ONCE INCIDENCE OF CHICKEN POX DECLINES
Executive Summary
Merck's Varivax chicken pox vaccine has unquestionable short- term efficacy, but the long-term efficacy of the varicella vaccine remains unclear, FDA's Vaccines & Related Biological Products Advisory Committee concluded at its Jan. 27 meeting.