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Some diseases require only one vaccination that lasts forever. Others require repeated vaccinations. Why might a vaccination like the flu vaccine only last a short time? A. The virus is more easily transmitted. B. The virus mutates much more rapidly. C. The virus is less dangerous. D. The virus is much smaller.

Respuesta :

the answer is B because the Flu mutates thats why we have to get more flu shots 
mshurtado

Answer:

B.

Explanation:

The virus mutates much more rapidly.  Flu virus are mainly compose by two proteins that gives it the pathogenic power: Hemaglutinnun and Neuraminidase.  The first one is a antigenic glycoprotein that is responsible for the union to the infected cell and there is a great variety, that makes difficult to create a vaccine.

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