Highly Effective Naturally Acquired Protection Against COVID-19 Persists for at Least 1 Year: A Meta-Analysis

The current massive COVID-19 immunization campaign has initiated a change in the course of the pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The duration of postvaccination protection can be estimated from longer-term monitoring of the persistence of naturally acquired protection (since November 2019). Therefore, this rapid meta-analysis was conducted to evaluate the reinfection rates in post–COVID-19 patients as the primary endpoint to predict protection not only in the general population but also in vulnerable long-term care (LTC) recipients.