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Can flu shots make you sicker?

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Study finds flu shot really does make you sicker. The Canadian Press September 9, 2012. TORONTO – A strange vaccine-related phenomenon spotted at the start of the 2009 flu pandemic may well have been real, a new study suggests. read more

Flu vaccines given with a needle are currently made in two ways: the vaccine is made either with a) flu vaccine viruses that have been ‘inactivated’ and are therefore not infectious, or b) with no flu vaccine viruses at all (which is the case for recombinant influenza vaccine). read more

It is still possible to get the flu after having a flu shot, either because you were one of the few people who was not fully protected or because the strain of influenza that made you sick was not included in the vaccine. Even so, you are less likely to have serious complications from the flu if you have had the shot. read more

a: Like the flu shot, the flu nasal spray (also called the LAIV, or live attenuated influenza vaccine) may cause headache, slight fever, dizziness, and fainting. read more

While the flu shot is a great and sometimes life-saving defense against the most common strains of influenza virus, it will not protect you from all respiratory illness. And there are a number of reasons that may explain why you still got sick after you get a flu shot. read more

If you’re really feeling sick for a sustained amount of time afterwards, well, you probably just caught another virus that the flu vaccine doesn’t protect you against. "The flu vaccine protects against influenza virus, but there are a number of other viruses that can cause a flu-like disease,” says Pekosz. read more

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