What are vaccines?

Immunogenic, non pathogenic preparations, naturally derived from the wild microorganism or genetically engineered or synthetized to mimic - or to instruct the body to produce- parts of the microbe Required components include: at least 3 : One B epitope capable of activating B cells or CD8+ T cell epitope activating Tc cells and one CD4+ T cell epitope activating Th, and one PRR receptor agonist activating Dc maturation