You might change your tune if it was your child that died after suffering a severe reaction. It's all fine in the abstract, but when it's your child, it's no longer abstract.
You may also change your mind if you (or your child) were one of those 549,000 cases of measles reported yearly in the US before 1969, or one of the 500 yearly deaths directly attributed to measles.
Since the danger of death or life-long complications due to measles have been removed from our collective memories by a generation of effective herd immunization, now we're more concerned about the possible negative dangers of vaccination, which may impact a small percentage of the population, and are advocating exposing the greater population to the dangers of the disease, all based on false and unfounded accusations promoted by ex-Playboy model turned junk scientist Jenny McCarthy, and discredited tin-foil conspiracists.
There were over 300 deaths attributed to malfunctioning seat belts in 2014, does that justify a movement to stop using seat belts?
The anti-vaccine movement is unfounded hysteria based on junk science and correlation/causation logical fallacies that will hurt more children than it will help.
I feel bad for those parents whose children may have been hurt or killed by complications with vaccinations, but their deaths do not add up to sufficient cause to endanger all the nation's children.
World-wide, there were more than 500,000 deaths from measles in 2003... none in the US.
Last year, 105 kids died from the flu. Ninety percent were not vaccinated.
From June 3rd 2007 through January 24th 2015 there have been 6,328 preventable deaths attributed to lack of vaccination in the US.
Vaccines work.