Five years after the virus that causes COVID emerged in China it still holds some mysteries.

If you’ve been sick with COVID-19, you may have some protection against certain versions of the common cold.

The coronavirus mutant that is now dominant in the United States spreads faster than its omicron predecessors, is adept at escaping immunity and might possibly cause more serious disease.

An extra-contagious version of the coronavirus has taken over the world.

The coronavirus mutant widely known as stealth omicron is now causing more than a third of new omicron cases around the world.

Scientists say the omicron descendant gaining ground in some parts of the world may be 1 1/2 times more contagious than the original omicron variant.