★ Immunity and Vaccines Quiz
Widespread immunity that protects the population from the spread of disease is called
A. seropositivity
B. cross-reactivity
C. epidemic prophylaxis
D. herd immunity
Select your answer:
Topics:
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Microbiology › ViewAn antihistamine will
A. block synthesis of leukotrienes.
B. reverse spasms of respiratory smooth muscles.
C. inhibit the activity of lymphocytes.
D. bind to histamine receptors on target organs.
Heart and Blood Vessels › View
Identify
A. Pulmonary veins
B. Pulmonary artery
C. Aorta
D. Vena cava