The scientific research shows that vaccines are safe and effective, but that hasn't stopped some organizations from pushing unfounded fears that vaccines could cause autism and other health problems in children.
One of those organizations, the National Vaccine Information Center, is now encouraging parents to stick anti-vaccine warnings on Halloween candy, as the blog Respectful Insolence reported:
Again, there's no credible evidence that vaccines pose a risk to children. In fact, one of the healthiest things parents and their kids could do this holiday season is get a flu shot.
To learn more about vaccines, read Vox's explainer and watch this two-minute video: