Abstract Background The Omicron SARS-CoV-2 variant is responsible for a major wave of
COVID-19, with record case counts reflecting high transmissibility and escape from prior�…

Summary Background The SARS-CoV-2 Omicron variant became a global concern due to
its rapid spread and displacement of the dominant Delta variant. We hypothesized that part�…

Background The increase in SARS-CoV-2 infections in December 2021 was driven primarily
by the Omicron variant, which largely displaced the Delta over a three-week span. Outcomes�…

Background The increase in SARS-CoV-2 infections in December 2021 in the United States
was driven primarily by the Omicron variant which largely displaced the Delta over a three�…

Objectives: High viral load in upper respiratory tract specimens observed for Delta cases
might contribute to its increased infectivity compared to the other variant. However, it is not�…

(Omicron) variant is of great importance to devising public health interventions. Increased
viral load has been reported as one cause of increased infectiousness in prior emergent�…

Background Elucidating viral dynamics within the host is important for designing public
health measures against SARS-CoV-2, particularly during the early stages of infection when�…

While it is now evident that Omicron is rapidly replacing Delta, due to a combination of
increased transmissibility and immune escape, it is less clear how the severity of Omicron�…

Rapid transmission of the SARS-CoV-2 Omicron variant has led to record-breaking case
incidence rates around the world. Since May 2020, the REal-time Assessment of Community�…

Background Estimates of the severity of the SARS-CoV-2 omicron variant (B. 1.1. 529) are
crucial to assess the public health impact associated with its rapid global dissemination. We�…