Definitions:

1. Immunogen consiting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies. ADJECTIVE
   • The early smallpox vaccinum was derived from cowpox, marking a major breakthrough in immunology.
2. In botanical context, refers to a genus of shrubs that includes species like edible berries, commonly found in temperate regions. NOUN
   • Many species of the Vaccinum genus, such as blueberries and cranberries are highly valued for their nutritional benefits.

Synonyms:

• vaccine