Scientists worry that a contagious coronavirus variant may soon push cases up in the United States just as it has in Europe and Asia. One reason? After about two months of falling cases in the U.S., COVID-19 restrictions have been lifted across the nation.
Vaccines appear just as effective against both types of omicron, but breakthrough infections are possible. And experts point out that vaccination rates are lower in the U.S. than the U.K. About 74% of those 12 and older are fully vaccinated in the U.S, compared with 86% in the U.K.
Still, not all experts are equally concerned about a BA.2-related rise in U.S. cases. Dr. James Musser, head of genomic medicine and infectious diseases at Houston Methodist, said the variant has so far only caused about 1% to 3% of cases in his medical system. Cases there have usually tracked closely with what's happening in the U.K.Scientists and health officials are keeping their eyes on a descendant of the omicron variant called BA.2.
Much remains unknown about the hybrid. There's no evidence it causes more severe disease, and it doesn't look like it's infecting many people. CDC researchers identified 9 samples, seven from the mid-Atlantic region in a study released Monday that hasn't yet been peer-reviewed. Topol, who was not involved in the research, said there's no evidence it has the potential to spread.
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