ANATOMY

Detailed explanation-1: -Vaccines contain weakened or inactive parts of a particular organism (antigen) that triggers an immune response within the body. Newer vaccines contain the blueprint for producing antigens rather than the antigen itself.

Detailed explanation-2: -Vaccines give you immunity to a disease without you getting sick first. They are made using killed or weakened versions of the disease-causing germ or parts of the germ (called antigens). For some vaccines, genetic engineering is used to make the antigens used in the vaccine.

Detailed explanation-3: -Active Immunity Vaccine-induced immunity is acquired through the introduction of a killed or weakened form of the disease organism through vaccination.

Detailed explanation-4: -Live attenuated vaccines must replicate in order for the body to produce an immune response.

Detailed explanation-5: -During the immune response mounted by the body in response to exposure to toxoids, Th2 (CD4+) and B-cells become activated which produce immunoglobulins against the immunogenetic part of the toxoid (which is the same as it is in the toxin), allowing for protection against the actual toxin should exposure ever occur.