“One of the fundamental errors in thinking about measles vaccine effectiveness is that receipt of measles-mumps-rubella (MMR) vaccine equates to bona fide immunity against measles virus. Indeed, it is commonly claimed by health organizations like the CDC that receiving two doses of the MMR vaccine is “97 percent effective in preventing measles,” despite a voluminous body of contradictory evidence from epidemiology and clinical experience.
This erroneous thinking has led the public, media and government alike to attribute the origin of measles outbreaks, such as the one reported at Disney in 2015 (and which lead to the passing of SB277 that year, stripping vaccine exemptions for all but medical reasons in California), to the non-vaccinated, even though 18% of the measles cases occurred in those who had been vaccinated against it — hardly the vaccine’s two-dose claimed “97% effectiveness.” The vaccine’s obvious fallibility is also indicated by the fact that that the CDC now requires two doses.”
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