1. World Health Organization , Tracking SARS-CoV-2 variants, https://www.who.int/emergencies/what-we-do/tracking-SARS-CoV-2-variants , (accessed January 6, 2022 )
2. CDC , Science Brief: Omicron (B.1.1.529) Variant, https://www.cdc.gov/coronavirus/2019-ncov/science/science-briefs/scientific-brief-omicron-variant.html , (accessed January 6, 2022 )
3. World Health Organization , Enhancing Readiness for Omicron (B.1.1.529): Technical Brief and Priority Actions for Member States , World Health Organization , Geneva, Switzerland , 2021
4. Highly mutated SARS-CoV-2 Omicron variant sparks significant concern among global experts – What is known so far?
5. SARS‐CoV‐2 Omicron variant: Characteristics and prevention