Tara Hills came out publicly for vaccinating after her 7 children all came down with whooping cough.

The Hills family pre-cough. (via The Scientific Parent)

If there's one thing I never expected, it's that vaccines would become controversial again in my lifetime. Sure, people weren't sold on them when they were new, but that was 200 years ago. Many of the most common vaccines we use today are close to 100 years old, and have decades of medical research supporting their effectiveness and safety. The anti-vaccination movement, however, is mainly based on one discredited study from 1998.

The overwhelming evidence and public opinion in support of vaccines often make anti-vaxxers feel persecuted, however, and cause them to become more resolute in their stance. One example is Tara Hills of Ottawa, Canada, who decided to stop vaccinating her seven kids due to distrust of the medical community. She wrote in a blog post on The Scientific Parent:

Sources: The Washington Post | The Scientific Parent