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 …

The specific antibodies induced by SARS-CoV-2 infection may provide protection against a
subsequent infection. However, the efficacy and duration of protection provided by naturally …

Background The protective effectiveness provided by naturally acquired immunity against
SARS-CoV-2 reinfection remain controversial. Objective To systematically evaluate the …

Background Vaccination against coronavirus disease 2019 (COVID-19) can mitigate the
burden of health care worker (HCW) infection. We investigate the burden of HCW illness and …

This was a household-based prospective cohort study conducted in Rio de Janeiro, in which
people with laboratory-confirmed coronavirus disease 2019 (COVID-19) and their …

Objectives This aim of this study was to examine the relationship between severe acute
respiratory syndrome coronavirus 2 (SARS-CoV-2) seropositivity and subsequent infection …

Experts have warned against the pandemic burden on healthcare workers early on,
however little is known about the evolution of this burden with time, in addition to the long …

Current scientific evidence highlights the need to reassess the occupational risks,
considering not only the new circumstances of virus spread and COVID-19 occurrence but …