When immunization levels in a population are high, ________ provides protection from infection for at-risk persons who cannot be immunized
A) contact immunity
B) active immunization
C) herd immunity
D) adjuvant therapy
E) variolation
C
Biology & Microbiology
You might also like to view...
Anoxygenic photosynthesis occurs in which of the following organisms?
Biology & Microbiology
Cytotoxic T cells contain which type of molecules that punch holes in the plasma membranes of potential pathogens?
A. perforin B. antioxidant C. interferon D. steroid E. complement
Biology & Microbiology
The layer of the digestive tract that contains smooth muscle is the ________
Fill in the blank(s) with correct word
Biology & Microbiology
Hardy-Weinberg equilibrium will not occur in a population in which
A. Mutation do not occur B. Individuals immigrate or emigrate C. Sexual selection does not occur D. Natural selection does not occur E. Individuals mate at random
Biology & Microbiology