What to know about COVID-19 (SARS-CoV-2) Omicron Variant Sub-Lineages? Understanding the evolution of Omicron and its sub-lineages can provide insight into the risk of another “Omicron”-type variant. In this paper we examine in every aspect of what to know about COVID-19 (SARS-CoV-2) Omicron sub-variants. COVID-19 Omicron BA.2 & BA.3 Sub-variants The BA.3 sub-lineage has been...