Seroprevalence surveys suggest that more than a third and possibly more than half of the
global population has been infected with SARS-CoV-2 by early 2022. As large numbers of …

Introduction A precise estimate of the frequency and severity of SARS‐CoV‐2 reinfections
would be critical to optimize restriction and vaccination policies for the hundreds of millions …

We systematically reviewed studies to estimate the risk of SARS-CoV-2 reinfection among
those previously infected with SARS-CoV-2. For this systematic review, we searched …

Background The aim was to evaluate the necessity of coronavirus disease 2019 (COVID-19)
vaccination in persons with prior COVID-19. Methods Employees of the Cleveland Clinic …

Data on effectiveness and protection duration of Covid-19 vaccines and previous infection
against general SARS-CoV-2 infection in general populations are limited. Here we evaluate …

Background Universities are vulnerable to infectious disease outbreaks, making them ideal
environments to study transmission dynamics and evaluate mitigation and surveillance …

Background The purpose of this study was to evaluate the necessity of COVID-19
vaccination in persons previously infected with SARS-CoV-2. Methods Employees of the …

An update is available for this article. Background: The strength and duration of immunity
from infection with SARS-CoV-2 are important for public health planning and clinical …

Background In a prospective healthcare worker (HCW) cohort, we assessed the risk of
SARS-CoV-2 infection according to baseline serostatus. Methods Baseline serologies were …

This retrospective observational study aimed to gain a better understanding of the protective
duration of prior SARS-CoV-2 infection against reinfection. The objectives were two-fold: to …