prophylactic - a medicine or course of action used to prevent disease.
vaccine - a substance used to stimulate immunity to a particular infectious disease or pathogen, typically prepared from an inactivated or weakened form of the causative agent or from its constituents or products.
Don't think that's true.
prophylactic - a medicine or course of action used to prevent disease.
vaccine - a substance used to stimulate immunity to a particular infectious disease or pathogen, typically prepared from an inactivated or weakened form of the causative agent or from its constituents or products.