Came across these - not recent - articles yesterday:
Why the 'Prius Driving, Composting' Set Fears VaccinesWealthy L.A. Schools' Vaccination Rates Are as Low as South Sudan'sAnti-vaccination sentiment spans the ideological spectrum, from leftist anarchists all the way through to rightist anarchists, with lots of "natural" Luddites and anti-Western-medicine conspiracy theorists in between.
I'm not comfortable with government mandating vaccination - and am not sure the Feds have that authority in the USC. At the same time un-vaccinated people are both susceptible to serious illnesses
and possible vectors for the spread of those illnesses. The current measles outbreak illustrates this: either an un-vaccinated alien (legal or illegal) or an un-vaccinated American contracted the disease outside of the US; this person then went into a very popular public place, where lots of un-vaccinated people contacted it; those people in turn may have passed it on to other un-vaccinated people; etc..
A substantial case could be made that states mandating vaccination would be appropriate protection of citizens. The fly in that ointment is that a simple mandate may run afoul of the First Amendment's
Free exercise clause with Hindus (and possibly Buddhists) who might object to animal cells being used to produce vaccines, and with Catholics when fetal cells have been used to produce some vaccines. And to be blunt, the Feds and many states have shown themselves eager to trample many people's religious freedoms and rights, theologically conservative Christians especially.