Join Date: Jan 2012
Location: United Kingdom (have lived previously in the USA).
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I don't know about the flu thing (I get the shot many, but not every year because at least then I'm protected from the virus strains which are in it, and anecdotally I've always been healthier the winters I did get it).
But I wanted to comment on the science behind why non vaxxers might be speeding up evolution (mutation) of bacteria/viruses.
The more of an organism there is around the more reproduction of that organism there is. So for example small pox was eradicated and is therefore no longer evolving. Polio is very rare and so there's limited chance for it to reproduce. Measles just got a big chance to reproduce itself a lot by spreading around 50 (mostly unvaccinated) people in Disneyland.
Evolution is driven by small mutations which have a chance if happening every time an organism reproduces. So the more reproduction, then the more mutation and the more chance a mutation will lead to a new version of the organism.
For my reference to this I cite every standard high school biology book (perhaps not any approved by the Texas school boards, but those approved by any working biologist).
Mother of two living in UK. Daughter (2007) born in USA, son (2010) born here. I'm pro natural birth, midwife care, breastfeeding, co-sleeping, baby wearing and a keen advocate of cloth diapering. I'm a full time working research scientist (physical sciences). Vaccines save lives.