1. World Health Organization. Naming the coronavirus disease (COVID‐19) and the virus that causes It. 2020. Accessed April 28 2020.https://www.who.int/emergencies/diseases/novel-coronavirus-2019/technical-guidance/naming-the-coronavirus-disease-(covid-2019)-and-the-virus-that-causes-it
2. World Health Organization. Classification of Omicron (B.1.1.529): SARS‐CoV‐2 variant of concern. Accessed November 26 2021.https://www.who.int/news/item/26-11-2021-classification-of-omicron-(b.1.1.529)-sars-cov-2-variant-of-concern
3. Covid-19: Omicron may be more transmissible than other variants and partly resistant to existing vaccines, scientists fear
4. Omicron SARS‐CoV‐2 new variant: global prevalence and biological and clinical characteristics;Meo SA;Eur Rev Med Pharmacol Sci,2021
5. Tracking and controlling the spatiotemporal spread of SARS-CoV-2 Omicron variant in South Africa