It occurs to me that one of the possible consequences of the anti-vaccine movement may be more adults getting childhood diseases. Perhaps this is already happening, or maybe it will happen in the future.
The reason: in the past before vaccines, most people got childhood diseases during childhood. But with most people still vaccinating their kids, it might be possible for the kids of anti-vaxxers to make it through childhood without getting these diseases. But that doesn't mean they are out of the woods, because now they are an adult who is not immune to these diseases either through vaccination or having had it during childhood.