New Covid subvariants BA.4 and BA.5 are the most contagious yet – and driving Australia’s third Omicron wave | Adrian Esterman

Australia is heading for its third Omicron wave in the coming weeks, as BA.4 and BA.5 become the dominant Covid strains. BA.4 and BA.5 are more infectious than previous Covid variants and subvariants, and are better able to evade immunity… Read More »New Covid subvariants BA.4 and BA.5 are the most contagious yet – and driving Australia’s third Omicron wave | Adrian Esterman