sábado, 29 de enero de 2011

Are vaccines safe?

A lot of parents hear different things about the MMR vaccine (that’s measles, mumps, and rubella) or the flu or chicken pox or pertussis vaccine and wonder “How safe are vaccines?” It’s not a stupid question, given the conflicting information you might hear from different sources. I’ve been doing research about vaccines and vaccine safety [...]

Source: http://feeds.mattcutts.com/~r/mattcutts/uJBW/~3/aUUnWddh5Qw/

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