LACK OF iMMUNITY: Because the older people have been exposed to the virus in past or have been vaccinated against the virus young people who did not get the vaccine for h1n1 vaccine have no immunity and it will hot them hard so get the annual flu vaccine to protect yourself against this strain of influenza.
Answered 4/8/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
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