Question

Why are antigens artificial or active

Answer 1

Answer:

Artificial antigen presenting cells (aAPCs) are a new technology and approach to cancer immunotherapy. ... When they encounter foreign pathogens, the antigen presenting cells alert the T cells—“the soldiers of the immune system”—that there is something foreign in the body with specific cell surface molecules.

Answer 2

Answer:

$Naturally acquired active immunity occurs when the person is exposed to a live pathogen, develops the disease, and becomes immune as a result of the primary immune response.Artificially acquired active immunity can be induced by a vaccine, a substance that contains the antigen.$