What The Study Did: Study results suggest that reinfections are rare events and that patients who have recovered from COVID-19 have a lower risk of reinfection. However, the observation ended before SARS-CoV-2 variants began to spread, and it is unknown how well natural immunity to the wild-type virus will protect against variants. .
Authors: Nicola Mumoli, M.D., of the Ospedale Fornaroli in Magenta, Italy, is the corresponding author.
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(doi:10.1001/jamainternmed.2021.2959)
Editor's Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.