Match the Term with Its Definition

Multiple Choice

Match the term with its definition.

-Attenuation

A) Vaccine produced by incorporating a gene from a pathogenic microorganism into the genome of nonpathogenic bacteria, yeast, or other cells
B) Vaccine in which intact, killed viruses or bacteria retain antigenic properties to induce a predominantly humoral immune response
C) The use of bacteria or viruses that have been weakened
D) Chemically inactivated bacterial exotoxins that induce the production of antibodies