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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.
B. The virus mutates much more rapidly.
Expert answered|chopsuey|Points 21|
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Asked 10/23/2012 8:04:53 AM
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Updated 132 days ago|7/30/2016 1:22:30 AM
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In economics, we compare variables in a graph for all of the following reasons EXCEPT to know the exact future.
Added 132 days ago|7/30/2016 1:22:30 AM
This answer has been confirmed as correct, not copied, and helpful.
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