Explainer: Why are there so many new Omicron sub-variants, like BA.4 and BA.5? - RNZ

A new Omicron sub-variant called BA.5 has arrived in Aotearoa. Why are we seeing more of these new sub-variants and what are the implications for the pandemic's existence?

By Sebastien Duchene and Ash Porter* of By now, many of us will be familiar with the Omicron variant of Sars-CoV-2, the virus that causes Covid-19. This variant of concern has changed the course of… [+5778 chars]

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