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  1. SARS-CoV-2 Omicron variant - Wikipedia

  2. COVID Omicron Variant: What You Need to Know - Johns Hopkins Medicine

  3. Omicron Variant: Symptoms and Treatment - WebMD

  4. SARS-CoV-2 B.1.1.529 (Omicron) Variant — United States...

  5. What we know — and don’t know — about the omicron variant - NBC News

  6. What We Know About Omicron, BA.4 and BA.5 - The New York Times

  7. Update on Omicron - World Health Organization (WHO)

  8. The Omicron variant: What we know and don’t know | CNN

  9. Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern

  10. Latest on Omicron Variant and COVID-19 Vaccine Protection