Why People Do It:
Because the chemical cocktails in vaccines are poisoning our children! Depending on what websites or episode of Oprah you watch, vaccines contain poisonous mercury, and are causing everything from autism to Sudden Infant Death Syndrome, which is about as scary a medical term as you can have without using "flesh-eating" or "dick-melting."
Why They Shouldn't:
In a word: science. While the folks pushing the anti-vaccination agenda mean well (though some seem to be doing it out of a knee-jerk fear of "Big Pharma") their claims aren't backed up by the actual studies.
"Trust me, those medicines will only make you sick. Also, I'm sorry, you seem to be dying for some reason."
Apparently the whole autism scare was based on a 1998 report which has since been rejected by all the major health organizations, and was even retracted by its authors in 2004. In the scientific world, that's the equivalent of calling bullshit on yourself.
As for Sudden Infant Death Syndrome, studies actually showed that the cases of SIDS actually went down 40 percent even as vaccination rates went up. This is science's way of saying "You are fucking wrong."
"According to my chart, you are a fucking moron."
A lot of the arguments against vaccination focus on the fact that a preservative used in some vaccines contains mercury. There are only two problems with this: the type they were using wasn't dangerous, and they stopped using it in 2001.
We're not saying vaccines have no risk. As with any drug, there is a chance some kids may have a bad reaction. But the odds of serious side effects are fairly slim compared to the risk of catching the disease if children are not vaccinated.
The thing is that when enough parents decide not to vaccinate their kids, those little germ factories start doing what they do best and epidemics break out. Then you end up with a little snotty babies running around infecting people like some kind of really cute zombie apocalypse.