The study shows a correlation: countries with a high vaccination rate of MMR vaccine show a lower COVID-19 death rate per 100 000 population. However, correlation studies are not capable of pinpointing the exact cause of reduced mortatlity - is it the MMR vaccine itself or something else that correlates with high vaccination rates of MMR, such as high rates of another vaccine or more restrictive quarantine medical policies during COVID-19 outbreak? Only experimental study can tell.
MMR Vaccine Appears to Confer Strong Protection from COVID-19: Few Deaths from SARS-CoV-2 in Highly Vaccinated Populations
MMR Vaccine Appears to Confer Strong Protection from COVID-19: Few Deaths from SARS-CoV-2 in Highly Vaccinated Populations
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