Question

Vaccines are
(a) treated bacteria or viruses or one of their
proteins
(b) MHC (major histocompatibility complex)
proteins
(c) curative medicines
(d) monoclonal antibodies

Answer 1

Answer:

option A

Explanation:

A vaccine is a biological preparation that provides active acquired immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins.