is varicella vaccine live attenuated
This study demonstrates the efficacy of the Oka/Merck live attenuated varicella virus vaccine administered to healthy children before exposure. During the course of one varicella season, 38 laboratory-confirmed cases of varicella occurred in placebo recipients, whereas none occurred in recipients of vaccine.
This study demonstrates the efficacy of the Oka/Merck live attenuated varicella virus vaccine administered to healthy children before exposure. During the course of one varicella season, 38 laboratory-confirmed cases of varicella occurred in placebo recipients, whereas none occurred in recipients of vaccine.