<p>Most immunizations are only 80-90 % effective. But when you have 90% of the population vaccinated, you get “herd” immunity. There are not enough unprotected people to spread the virus to any degree. So refusals for medical reasons are not a problem. Now we have up to 30-35% of the population in certain states able to refuse on the basis of religious or ANY reason. If you have 30% non-immunized and another 20% of the remaining 70% who did not develop adequate immunity you have 44% of the population who are not immune and the community no longer has herd immunity. The virus can spread more easily and you get large outbreaks. And teens and college students will die. Even adults we end up exposed with serious complications. Not to mention that the MMR vaccine is not administered until 18 mos of age. There will be infants and toddlers who succumb to a preventable disease.</p>
<p>In Montana, on 59% of adolescents have completed recommended vaccinations.</p>