Two mRNA vaccines are effective even without post-shot symptoms or prior SARS-CoV-2 infection

Vaccination with the two messenger RNA (mRNA) vaccines for SARS-CoV-2, the virus that causes COVID-19, yields a robust antibody response, even if a person did not develop significant symptoms following vaccination or did not have a prior SARS-CoV-2 infection. That's the key finding from a recent study of nearly 1,000 health care workers in the Johns Hopkins Health System who […]
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