More contagious version of omicron spreads in U.S., fueling worries
NPRMore contagious version of omicron spreads in U.S., fueling worries Enlarge this image toggle caption Jon Cherry/Getty Images Jon Cherry/Getty Images As the omicron surge continues to decline in the U.S., infectious disease experts are keeping a close eye on an even more contagious version of the variant that could once again foil the nation's hopes of getting back to normal. So even though BA.2 doesn't appear to make people sicker than the original omicron, just slowing down the decline in new cases would translate to more serious illness and death. "There are going to be plenty of people getting sick and ending up on respirators and dying because of BA.2," says Dr. Jeremy Luban, a virologist at the University of Massachusetts Medical School, especially among the millions who still aren't vaccinated. Although vaccination and prior infection does appear to protect people against BA.2, this version of the virus seems somewhat better at evading the immune system than the original omicron was.