Background We estimated combined protection conferred by prior SARS‐CoV‐2 infection
and COVID‐19 vaccination against COVID‐19‐associated acute respiratory illness (ARI) …

Background: Household transmission contributes to SARS-CoV-2 spread, but the role of
children in transmission is unclear. We conducted a study that included symptomatic and …

Background The mayhem COVID-19 that was ushered by the severe acute respiratory
syndrome coronavirus 2 (SARS-CoV2) was declared pandemic by the World Health …

Background The impact of immunosuppressive therapies on the efficacy of vaccines to
SARS-CoV-2 is not completely clarified. We analyzed humoral and T cell-mediated …

The origins of preexisting SARS-CoV-2 cross-reactive antibodies and their potential impacts
on vaccine efficacy have not been fully clarified. In this study, we demonstrated that S2 was …

During the first year of the COVID-19 pandemic, more than 90 million cases were reported
globally, with nearl y 2 million deaths. Case reporting depends on several factors, including …

Abstract The coronavirus disease 2019 (COVID‐19) pandemic is transmitted by severe
acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) and has affected millions of …

Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is still in an epidemic
situation, which poses a serious threat to the safety of people and property. Rapid diagnosis …

It is unclear whether the ChAdOx1 nCov-19 vaccine can induce the development of anti-PF4
antibodies in vaccinated individuals who have not developed thrombosis. The aim of this …

Recently, immune response to coronavirus disease (COVID-19) has attracted attention
where an association between higher antibody titer and worsening disease severity has …