Oregon has become one focal point for the left-wing anti-vax movement, as opposed to the religious right anti-vax movement.
Here's a piece on parents in Portland just making their own schedule, based on an intuition that kids just get too many too quickly. I cannot tell you how many emails flooded my inbox after writing about McCarthy, citing the numbers - they got bigger, there are more, there are just too many. That's the kind of data convincing parents to spread it out. By contrast:
“The recommended schedule is based on indisputable scientific evidence that the vaccines will work to prevent infections and are safe,” wrote Dr. Carol Baker, ACIP’s chair and a professor of pediatrics at the Baylor College of Medicine in Houston, in an email to Reuters Health…”The problem that we saw is that these kids are getting fewer shots total and they’re not catching up,” said [Dr. Steve Robison, the study's lead author from the Oregon Immunization Program].”Parents and doctors don’t realize how easy it is for kids on alternative schedules to fall behind,” he added.