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    1. vac·cine
      IPA[vakˈsēn]
    2. n. noun

      • 1. a substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, its products, or a synthetic substitute, treated to act as an antigen without inducing the disease:

        there is no vaccine against HIV infection
      • 2. a program designed to detect computer viruses and inactivate them.

    3. Variation

      • n.: noun: vaccine, plural noun: vaccines

      • noun

        an antigenic substance prepared from the causative agent of a disease or a synthetic substitute, used to provide immunity against one or several diseases:

        a program designed to detect computer viruses and inactivate them.

      • noun

        a vaccine against poliomyelitis containing attenuated virus and given by mouth.
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