As a third Omicron wave looms, here’s what we know about BA.4 and BA.5

Professor Adrian Esterman

Australia is heading for its third Omicron wave in the coming weeks, as BA.4 and BA.5 become the dominant COVID-19 strains.

BA.4 and BA.5 are more infectious than previous COVID-19 variants and subvariants and are better able to evade immunity from vaccines and previous infections. So we’re likely to see a rise in case numbers.