A second version of omicron is spreading. Here's why scientists are on alert
It's a sibling of the first omicron variant that swept the world. Is it more contagious? Does it cause severe disease? Will it keep current omicron surges going? Researchers are looking for answers.
Just as the omicron surge starts to recede in parts of the U.S., scientists have their eye on another coronavirus variant spreading rapidly in parts of Asia and Europe. It's officially called "omicron BA.2," and this week scientists detected cases of it in several U.S. states, including California, Texas and Washington.
Although BA.2 is currently rare in the U.S., scientists expect it to spread in the country over the next month. There's growing evidence that it's just as contagious as
