vaccine

US /vækˈsin,ˈvækˌsin/

・

UK /'væksi:n/

Shot using weak disease cells to stop same disease
A substance used to stimulate the production of antibodies and provide immunity against one or several diseases.
A preparation of weakened or killed microorganisms, or of antigenic proteins derived from them, used to induce protective immunity in animals.

Examples

a live vaccine containing the polio virus

one dose of BCG vaccine