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.

The doctor recommended getting the flu vaccine before the start of the winter season.

A preparation of killed microorganisms, living attenuated organisms, or living fully virulent organisms that is administered to produce or artificially increase immunity to a particular disease.

The polio vaccine has been instrumental in reducing the incidence of the disease worldwide.

vaccineadjective

Relating to or derived from a vaccine.

Government officials announced new vaccine requirements for travelers.