butterwb wrote:

"I know a few people who have been misdiagnosed; prescribed a medicine to which they had a bad reaction; or had a surgical procedure botched."

So do I. U.S. medical care is in trouble because it is badly organized which give rise to errors, and because many doctors do not take simple precautions such as washing their hands. Ahrucool is quite right that medicine causes harm and carries risk. However, vaccinations are not among the dysfunctional and risky procedures.

Of course they do have some slight risk, regrettably.

People who personally know someone who was hurt by a vaccine may get the notion that such events are widespread. This is called the Misleading Vividness logical fallacy.