The risk of infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) decreases substantially among patients who have recovered from coronavirus disease 2019 (Covid-19). However, it is unknown how long protective immunity lasts. Current guidelines recommend vaccination of recovered patients even though data regarding vaccine effectiveness in such cases are still limited.
Effectiveness of the BNT162b2 Vaccine after Recovery from Covid-19
Protection against SARS-CoV-2 after Covid-19 Vaccination and Previous Infection