A new study published in the journal of the American Society for Microbiology indicates that the mumps IgG titers, or levels of IgG antibody, are inversely correlated with severity in recovered COVID-19 patients previously vaccinated with the measles-mumps-rubella (MMR) vaccine.
Published on November 20, 2020, the researchers in this study found a significant inverse correlation (rs = -0.71, P < 0.001) between mumps titers and COVID-19 severity within the MMR II sub-group.
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