Why have so many new Omicron sub-variants appeared, such as BA.4 and BA.5? Is there a chance I’ll get infected again? Is the virus evolving at an accelerated rate?
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.