2023-01-19, 22:48
Why COVID's XBB.1.5 'Kraken' Variant Is So Contagious
https://www.scientificamerican.com/artic...ontagious/
A new variant of the virus that causes COVID has mutations that make it more transmissible, but vaccines are still likely to protect against severe disease
https://www.scientificamerican.com/artic...ontagious/