Naked Science Forum
Life Sciences => Cells, Microbes & Viruses => Topic started by: martin symons on 11/12/2009 10:30:02
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martin symons asked the Naked Scientists:
Why do some people have bad reactions to flu jabs...? (The reactions are as if they have contracted the flu virus).
What do you think?
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I can think of a few reasons off the top of my head:
they have an immune response to the vaccine that goes beyond that of normal people and triggers symptoms
they have an immune response to a substance in the jab (perhaps an allergy response)
the placebo effect
they actually caught a cold or the flu at the same time as they got the jab (this has to happen in quite a few cases, given the number of people who get vaccinated and the number of people who get colds and flus)