
In the latest battle of the coronavirus mutants, an extra-contagious version of omicron has taken over the world.
The coronavirus version known as BA.2 is now dominant in at least 68 countries, including the United States.

In the latest battle of the coronavirus mutants, an extra-contagious version of omicron has taken over the world.
The coronavirus version known as BA.2 is now dominant in at least 68 countries, including the United States.