Are the current measles outbreaks due to an “increasing number of unvaccinated children,” or is there another explanation? This 1984 study explained why the MMR vaccine wouldn’t eradicate measles as planned, despite very high levels of coverage. This study predicted that measles outbreaks would continue, even in fully vaccinated populations, due to primary vaccine failure, and that the initial success of the vaccine in the 70’s and 80’s would be due to a naturally immune adult population. bit.ly/v