Introduction: The coronavirus disease 2019 (COVID-19) pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has posed extraordinary challenges to global health systems and ...

In November 2021, the World Health Organization (WHO) first identified the Omicron mutation of the COVID-19 virus as a variant of concern. It quickly became the most common strain worldwide.

135 197 people aged 5–17 years (79 332 children and 55 865 adolescents) were included in the cohort for the vaccine effectiveness analysis against omicron BA.4 or BA.5, and 164 704 people aged 5–17 ...

“With Omicron and its subvariants being the dominant ... before those novel strains jump to humans. “The introduction and further spread of SARS-CoV-2 in an animal population might result ...

In late 2021, the omicron variant of SARS Coronavirus 2 (SARS-CoV-2) emerged and replaced the previously dominant delta strain. Effectiveness of COVID-19 vaccines against omicron has been challenging ...

Two new Omicron subvariants—BA.4 and BA.5, first identified in South Africa between January and February—are gaining steam in the United States, according to the latest estimates by the ...

Copyright: © 2022 The Authors. Published by Elsevier Ltd.

Moore serves on advisory boards for Pfizer, Moderna and GreenLightBio. The Omicron variant of the SARS-CoV-2 virus was discovered in South Africa and emerged in November 2021. Scientists have ...