Tag: BA.4 variant

Two new subvariants of Omicron, BA.4 and BA.5, are rapidly emerging due to their transmission advantages, vaccine-evading mutations, and waning immunity in certain regions.After several weeks of decline, the number ...

The emergence and rise of BA.4 and BA.5 in South Africa and several other parts of the world have raised concerns among experts about a potential new wave of COVID-19. ...