Omicron lineage variants Omicron (B.1.1529) Subvariants B.1.1.529_ R346K B.1.1.529 (Omicron WITHOUT R346K) BA.1.7418017R BA.1.6795406.1 BA.1.6795406.1R BA.1.7418017 BA.2.8346921 BA.2.8346921R BA.3 BA.3_R346K BA.4 B1.5