The original strain of the virus was displaced by the Alpha variant. Then we had Beta, then Delta and then Omicron. KP.2 is ...

And because the delta variant, first identified in India, can spread among vaccinated people, that extra layer of protection for recovered patients is probably helpful (SN: 7/30/21). Sign up for e ...

Faster post-COVID-19 recovery is observed after infection with the Omicron vs earlier variants, regardless of vaccination status.

The move, announced on Monday afternoon, comes amid a recent global surge in coronavirus cases sparked by the more infectious Delta variant. The world may never reach herd immunity against Covid ...