JAMA (Jnl. American Medical Assoc.): "Study Suggests Lasting Immunity After COVID-19, With a Big Boost From Vaccination"

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After an infection with SARS-CoV-2, most people—even those with mild infections—appear to have some protection against the virus for at least a year, a recent follow-up study of recovered patients published in Nature suggests. What’s more, this and other research demonstrates that vaccinating these individuals substantially enhances their immune response and confers strong resistance against variants of concern, including the B.1.617.2 (delta) variant.