A highly mutated new variant of the virus that causes Covid-19 has countries on alert as scientists scramble to understand how far it has spread and how well our immunity will defend against it. https://t.co/tInkuFJGAd— CNN (@CNN) August 19, 2023
A highly mutated new variant of the virus that causes Covid-19 has countries on alert as scientists scramble to understand how far it has spread and how well our immunity will defend against it. https://t.co/tInkuFJGAd