It has been more than one year since the first case of the coronaviruses was infected by
COVID-19 in China. The world witnessed three waves of the corona virus till now, and more …

The coronavirus disease (COVID-19), caused by severe acute respiratory syndrome-
coronavirus-2 (SARS-CoV-2) infection, is leading to unknown and unusual health conditions …

First infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is
associated with increased risk of acute and postacute death and sequelae in various organ …

Since its emergence in 2019, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-
2) has caused hundreds of millions of cases and continues to circulate globally. To establish …

The emergence of SARS-CoV-2 variants harboring mutations in the spike (S) protein has
raised concern about potential immune escape. Here, we studied humoral and cellular …

INTRODUCTION Although post facto studies have revealed the importance of severe acute
respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission from presymptomatic …

Background Increased understanding of whether individuals who have recovered from
COVID-19 are protected from future SARS-CoV-2 infection is an urgent requirement. We …

Background The degree to which infection with SARS-CoV-2 confers protection towards
subsequent reinfection is not well described. In 2020, as part of Denmark's extensive, free-of …

The emergence of SARS-CoV-2 variants has raised concerns about altered sensitivity to
antibody-mediated immunity. The relative resistance of SARS-CoV-2 variants B. 1.1. 7 and …

INTRODUCTION Immunological memory is the basis for durable protective immunity after
infections or vaccinations. Duration of immunological memory after severe acute respiratory …