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sarthaknitw sarthaknitw
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6 years ago
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.
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heyouheyou
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6 years ago
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sarthaknitw Author
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6 years ago
Correct Slight Smile TY
wrote...

Yesterday
I appreciate what you did here, answered it right Smiling Face with Open Mouth
wrote...

2 hours ago
this is exactly what I needed
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