The version of the coronavirus that surfaced in Britain late last year was shocking for many reasons. It came just as vaccines had offered a glimpse of the end of the pandemic, threatening to dash those hopes. It was far more contagious than earlier variants, leading to a swift increase in hospitalizations. And perhaps most surprising to scientists: It had amassed a large constellation of mutations seemingly overnight.
Source: Virus Variants Likely Evolved Inside People With Weak Immune Systems | Portside
