Read full article: Here’s what we know about the omicron variant of COVID-19 so far A COVID-19 virus model. Read full article: This may be the last PDF app you ever need There's a new type of smart ...

Since May, highly contagious "FLiRT" coronavirus variants – a term for new mutations of Omicron – have been driving a rise in infections and emergency room trips. Virus levels at local wastewater ...

Do masks work? And if so, should you reach for an N95, a surgical mask, a cloth mask or a gaiter? Over the past year and a half, researchers have produced a lot of laboratory, model-based and ...

The Centers for Disease Control and Prevention has updated its mask guidance to note that N95 and KN95 masks offer higher levels of protection against COVID-19 than cloth masks, although it stopped ...

Wearing a mask is one way to reduce the spread of COVID-19. There are many types, including surgical masks, cloth masks, and respirators. SARS-CoV-2, the virus that causes COVID-19, usually transmits ...