Background As vaccine supply and access remain limited in many parts of the world,
understanding the duration of protection from reinfection after natural infection is important …

It has been recently suggested that prior exposure to seasonal coronaviruses might confer
cross-protection against SARS-CoV-2. 1 Whether SARS-CoV-2 infection itself confers …

Background The degree of protective immunity conferred by infection with severe acute
respiratory syndrome coronavirus 2 (SARS-CoV-2) is currently unknown. As such, the …

Following acute infection, individuals COVID-19 may still shed SARS-CoV-2 RNA. However,
limited information is available regarding the active shedding period or whether infectious …

Importance Serological assays detecting specific IgG antibodies generated against the
Spike protein following Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) …

This meta-analysis aims to synthesize global evidence on the risk of reinfection among
people previously infected with SARS-CoV-2. We systematically searched PubMed, Scopus …

Background Among the most consequential unknowns of the devastating COVID-19
pandemic are the durability of immunity and time to likely reinfection. There are limited direct …

The protection against emerging SARS-CoV-2 variants by pre-existing antibodies elicited
due to the current vaccination or natural infection is a global concern. We aimed to …

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 …

Background Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a
global pandemic. The proportion of infected individuals who seroconvert is still an open …