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The flu vaccine contains the dead virus of the three types of influenza that research indicates will be prevalent during the flu season. Which of the following could be the cause of a person getting the flu that DID get the vaccine that year? a. The flu is caused by a bacterium that is not in the vaccine. b. The vaccine they received did not contain enough of the dead virus. c. The person came in contact with a strain of the flu that was not part of that year’s vaccine. d. The person got the flu last year which made them more susceptible to future infections.

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Flu is caused by viruses not bacteria main property of these viruses is they change there genetic material very frequently. hope u got the idea.
not really
The bacteria changes its genetic material often means there are many variants of the flu around. The vaccines are for proteins in one variant or another...

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so c?
thank u

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