The way in which a disease is spread from one person to another is known as the ________.
D. incubation period
Select your answer:
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Other quiz:Microbiology › View
Cytotoxic T cells
A. secrete granzymes and perforins that damage target cells.
B. lack specificity for antigen.
C. secrete interleukin-2 to stimulate B and T cells.
D. are activated by free, soluble antigens.
Respiratory System › View
the windpipe; a passage through which air moves in the respiratory system.