When her firstborn was just a baby, Catie heard some frightening rumors about vaccines that made her stop immunizing completely (until she learned how wrong that rumor was). Erica, however, has always been a staunch vaccine advocate, but her relatives are vaccine refusers. Nathan and Karen talk to both Catie and Erica to learn what we can do to change the minds of the parents of the unvaccinated kids we love.

This episode includes some of the latest research on the topic and updates on what is happening Around the Web concerning vaccines.