With the large number of individuals infected and recovered from Covid-19, there is intense
discussion about the quality and duration of the immunity elicited by SARS-CoV-2 infection …

Abstract Since December 2019, COVID-19, the clinical syndrome associated with SARS-
CoV-2 infection, has infected more than 6.2 million people and brought the function of the …

The last century has witnessed several assaults from RNA viruses, resulting in millions of
death throughout the world. The 21st century appears no longer an exception, with the trend …

Objective We aimed to look at the burden of disease caused by SARS-COV-2 reinfections
and identified potential risk factors for disease severity. Methods We used national …

In this large cohort of healthcare workers, we aimed to estimate the rate of reinfections by
SARS-CoV-2 over 2 years of the COVID-19 pandemic. We investigated the proportion of …

Background: Post infection immunity and post vaccination immunity both confer protection
against COVID-19. However, there have been many whole genome sequencing proven …

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 …

There is rising concern that patients who recover from COVID-19 may be at risk of
reinfection. In this preprint, Bao et al. investigated acquired immunity to SARS-CoV-2 in …

Despite over 140 million SARS‐CoV‐2 infections worldwide since the beginning of the
pandemic, relatively few confirmed cases of SARS‐CoV‐2 reinfection have been reported …

A few molecularly proven severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
cases of symptomatic reinfection are currently known worldwide, with a resolved first …