1. SARS-CoV-2 B.1.1.529 (Omicron) variant - United States, December 1-8, 2021;MMWR Morb Mortal Wkly Rep,2021
2. Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern,2021
3. Early assessment of the clinical severity of the SARS-CoV-2 omicron variant in South Africa: a data linkage study;Wolter;Lancet,2022
4. Omicron (B.1.1.529) - variant of concern - molecular profile and epidemiology: a mini review;Kannan;Eur Rev Med Pharmacol Sci,2021
5. Characteristics and outcomes of hospitalized patients in South Africa during the COVID-19 Omicron wave compared with previous waves;Maslo;JAMA,2021