The Lancet

AP Photo/Mary AltafferFILE - In this Jan. 15, 2021, file photo, Dr. Yomaris Pena, Internal Medicine Physician with Somos Community Care at a COVID-19 extracts the last bit of Pfizer-BioNTech COVID-19 Vaccine out of a vial so as not to waste it at a vaccination site at the Corsi Houses in the East Harlem neighborhood of New York. An untold number of Americans have managed to get COVID-19 booster shots even though the U.S. government hasn't approved them. They're doing so by taking advantage of the nation’s vaccine surplus and loose tracking of those who have been fully vaccinated.  (AP Photo/Mary Altaffer, File)

What if you’re not vaccinated but immune anyway?

In the detailed planning about vaccines and returning to offices, there’s a group of people everyone is overlooking.

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