Background Estimates of community spread and infection fatality rate (IFR) of COVID‐19
have varied across studies. Efforts to synthesize the evidence reach seemingly discrepant …

Objective To estimate the infection fatality rate of coronavirus disease 2019 (COVID-19) from
seroprevalence data. Methods I searched PubMed and preprint servers for COVID-19 …

Background Waning of vaccine protection against severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2) infection or coronavirus disease 2019 (Covid-19) is a concern …

Background Waning of vaccine protection against coronavirus disease 2019 (Covid-19) and
the emergence of the omicron (or B. 1.1. 529) variant of the severe acute respiratory …

Background The protection conferred by natural immunity, vaccination, and both against
symptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection with …

Abstract SARS-CoV-2 Omicron BA. 1 and BA. 2 subvariants are genetically divergent. We
conducted a matched, test-negative, case-control study to estimate duration of protection of …

The SARS-CoV-2 pandemic continues to be a global health concern. The mRNA-1273
(Moderna) vaccine was reported to have an efficacy of 94.1% at preventing symptomatic …

Abstract Short Summary Severe acute respiratory syndrome coronavirus 2 infection from the
Omicron variant in children/adolescents is less severe than infection from the Delta variant …

The aggravated problem of lead pollution, especially in aquatic environments, necessitates
the development of eminent adsorbents that could radically solve this environmental …

Background Reinfection with the severe acute respiratory syndrome coronavirus 2 (SARS-
CoV-2) has been documented, raising public health concerns. SARS-CoV-2 reinfections …