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Why are there so many new Omicron sub-variants, like BA.4 and BA.5? Will I be reinfected? Is the virus mutating faster?

  • Written by Sebastian Duchene, ARC DECRA Fellow, The University of Melbourne
Why are there so many new Omicron sub-variants, like BA.4 and BA.5? Will I be reinfected? Is the virus mutating faster?Shutterstock

By now, many of us will be familiar with the Omicron variant of SARS-CoV-2, the virus that causes COVID. This variant of concern has changed the course of the pandemic, leading to a dramatic rise in cases around the world.

We are also increasingly hearing about new Omicron sub-variants with names such as BA.2, BA.4 and now BA.5. The...

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