The reason that vaccines against influenza must be administered annually, unlike vaccines against measles, is _____
a. the antigens that stimulate protection against influenza virus are inside the virion and not on the surface
b. influenza is an RNA virus with a higher mutation rate
c. influenza stimulates T-independent responses that fail to generate memory cells
d. the polysaccharide antigens of influenza stimulate poor immune responses.
B
You might also like to view...
The combining form that means lung is ________
Fill in the blank(s) with correct word
A combining form that means blood is ________
Fill in the blank(s) with correct word
The "feel good" neurotransmitter in the brain that produces the euphoria associated with drug use is
A) serotonin. B) dopamine. C) epinephrine. D) norepinephrine.
Student conduct (e.g., participation and attendance) is influenced by having sound policies and procedures
Indicate whether the statement is true or false