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Vaccine

ˈvaksiːn

Vaccine definitions
noun
vaccine vaccines
  1. 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

    "every year the flu vaccine is modified to deal with new strains of the virus"

  2. a program designed to detect computer viruses and inactivate them

    "the rate of use of vaccines for computer viruses is not as high as in the US, Japan, and other countries"