H Hasan New member 12 Nis 2022 #1 Covid update: 2 new Omicron sister variants BA.4 and BA.5 on WHO radar Only a few dozen cases of BA.4 and BA.5 have been reported to the global GISAID database, according to WHO
Covid update: 2 new Omicron sister variants BA.4 and BA.5 on WHO radar Only a few dozen cases of BA.4 and BA.5 have been reported to the global GISAID database, according to WHO
