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 …

Several nations have recently begun to relax their public health protocols, particularly
regarding the use of face masks when engaging in outdoor activities. This is because there …

Severe acute respiratory syndrome-related coronavirus (SARS-CoV-2), the causative agent
of coronavirus disease 2019 (COVID-19), is highly contagious and remains a major public …

Since the discovery of SARS-CoV-2, changes in genotype and reinfection with different
variants have been observed in COVID-19-recovered patients, raising questions around the …

When the corona pandemic commenced more than two years ago, it was quickly recognized
that people with metabolic diseases show an augmented risk of severe COVID-19 and an …

The development and deployment of vaccines against COVID-19 demonstrated major
successes in providing immunity and preventing severe disease and death. Yet SARS-CoV …

Background Although the COVID-19 pandemic has persisted for over 3 years, reinfections
with SARS-CoV-2 are not well understood. We aim to characterize reinfection, understand …

Background Knowledge about protection conferred by previous Severe Acute Respiratory
Syndrome Coronavirus 2 (SARS-CoV-2) infection and/or vaccination against emerging viral …

Introduction The SARS-CoV-2 outbreak has threatened the human population globally as
the numbers of reinfection cases even after large-scale vaccination. Trials have been carried …

Abstract Background In December 2019, severe acute respiratory syndrome coronavirus 2
(SARS-CoV-2) emerged with a high transmissibility rate and resulted in numerous negative …