Multiple Choice
Influenza A strains are characterized by
A) whether or not humans are infected.
B) the type of HA and NA spikes found on the viral surface.
C) the type of animal in which the strain originated.
D) the country in which the strain originated.
E) whether the virus contains DNA or RNA.
Correct Answer:
Verified
Correct Answer:
Verified
Q12: Which component of the lower respiratory tract
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