Michaeleen Doucleff

The World Health Organization says it will release its report investigating the origins of COVID-19. It concludes that the virus likely came from a bat and a laboratory leak is extremely unlikely.

The report states that the coronavirus most likely did not originate at the wet market in Wuhan and that a lab leak was "an extremely unlikely pathway."

Researchers worry another coronavirus will spill over from a bat or some other creature. They're hunting for sources — and finding evidence that a new pandemic could be around the corner.

All it took was one coronavirus to turn the world upside down. But how many more are out there, lurking in animals? And what's the chance they could jump into people and trigger another outbreak?

Peter Daszak of the investigative team sent to Wuhan says the farms were probably where the coronavirus first jumped from bats to another animal before infecting humans.

In some cultures kids roll their eyes when asked to do chores. In others, they'll pitch in without even being asked. Researchers have identified two key practices to raise helpful children.

At a news conference this week, the World Health Organization made a surprising statement: The coronavirus could possibly transmit on frozen packages of food.

The World Health Organization says scientists need to find out whether the coronavirus can be transmitted through frozen meat shipments — a theory the Chinese government has promoted heavily.

The World Health Organization has wrapped up its investigation in China into the origins of COVID-19. The team said it's highly unlikely the virus leaked from a lab and more research is necessary.

Scientists are looking at a possible link between the mutations in the U.K. and South Africa — and those in a patient in Boston who had living, growing virus in his body for five months.

One day you're worrying about the regular old coronavirus. Then — seemingly out of the blue — there are variants. Worrisome variants! How did they come to be? And why are they likely more contagious?

They don't yet understand why the coronavirus variant called P.1 has spread so explosively there. Its set of mutations seem especially dangerous. And this week P.1 was confirmed in the U.S.

Moderna is developing a booster shot for its COVID-19 vaccine to ensure that it works against a variant from South Africa. The variant contains mutations that help the virus evade the immune system.

The variant in Brazil is causing a surge in Manaus, a city where the virus previously infected huge numbers in the spring of 2020. Researchers are trying to determine why.

More transmissible forms of the coronavirus have emerged on three continents, and at least one is circulating across the U.S. But scientists are especially worried about a variant spreading in Brazil.

It appears to be 50% more infectious, and researchers predict the new coronavirus variant could start to dominate in the U.S. by March. The time to prepare is now, they say.

The U.K. is struggling to stop a more contagious version of the coronavirus. NPR discusses what might happen if the variant spreads across the U.S.

Health experts are hopeful that vaccines will stop the coronavirus outbreak in the U.S. But what will it take to make the 12 to 15 billion doses to cover the entire globe?

With new variant in the coronavirus cropping up in several states, we take a look at how viruses mutate and how those mutations can make the coronavirus more contagious.

Mathematical modeling suggests that the mutations in this variant make the virus more transmissible. What does that mean for preventive measures — and the new vaccines?