The persistent COVID-19 pandemic since 2020 has brought an enormous public health
burden to the global society and is accompanied by various evolution of the virus genome …

Objectives To compare severity and clinical outcomes from Omicron as compared with the
Delta variant and to compare outcomes between Omicron sublineages. Methods We …

OBJECTIVES The objective was to compare COVID‐19 outcomes in the Omicron‐driven
fourth wave with prior waves in the Western Cape, assess the contribution of undiagnosed …

ABSTRACT Background The Omicron (B. 1.1. 529) variant of SARS-CoV-2 has rapidly
achieved global dissemination, accounting for most infections in the United States by …

New genetic variants of severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2)
constantly emerge through unmitigated spread of the virus in the ongoing Coronavirus …

Abstract Background Although the SARS-CoV-2 Omicron variant is considered to induce
less severe disease, there have been no consistent results on the extent of the decrease in …

Background COVID-19, the coronavirus disease that emerged in December 2019, caused
drastic damage worldwide. At the beginning of the pandemic, available data suggested that …

The Omicron variant was first detected in October 2021, which evolved from the original
SARS‐CoV‐2 strain and was found to possess many mutations. Immune evasion was one of …

Omicron SARS-CoV-2 variant of concern: A review on its trans... : Medicine Omicron SARS-CoV-2
variant of concern: A review on its transmissibility, immune evasion, reinfection, and severity …

There has been limited data presented to characterize and quantify breakthrough SARS-
CoV-2 infections, hospitalizations, and mortality in vaccinated patients with hematologic …