Great 1 hour documentary on vaccines that shows both sides of the story at http://video.pbs.org/video/1479321646/# . I personally think vaccines do more good than harm but as a libertarian I believe everyone should be able to make that choice. It looks like the general public and medical professionals still think vaccines are essential then I guess students can be refused entry to public schools if they are not vaccinated. Home schooling or private schools are the only other options. In a ideal world I don’t think there should be public funded schools and I believe this would open up the market to parents who want to send their children to un-vaccinated schools.