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 COVID-19 cases, pandemic restrictions have been lifted across the U.S. Many people are taking off their masks and returning to indoor spaces like restaurants and theaters.
In the U.S., the latest data from the Centers for Disease Control and Prevention shows overall COVID-19 cases have been trending down. But the share caused by BA.2 is up significantly; the variant accounted for about 35% of new infections reported last week. 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.
Earlier this month, Maria Van Kerkhove of the World Health Organization said the hybrid has been detected at “very low levels” in France, the Netherlands and Denmark. And two recent studies, which have not yet been peer-reviewed, point to a tiny number of cases in the U.S.
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