Biology, 30.01.2020 03:59 Machuco127
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.
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Some diseases require only one vaccination that lasts forever. others require repeated vaccinations....
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