Ohio researchers say they’ve identified two new Covid strains likely originating in the U.S.

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Healthcare workers administer free Covid-19 tests to people in their cars in the parking lot of the Columbus West Family Health and Wellness Center in Columbus, Ohio on November 19, 2020.

Stephen Zenner | AFP | Getty Images

Researchers in Ohio said Wednesday that they’ve discovered two new variants of the coronavirus that likely originated in the U.S. — one of which quickly became the dominant strain in Columbus, Ohio over a three-week period in late December and January.

Like the strain first detected in the U.K., the U.S. mutations appear to make Covid-19 more contagious but do not seem like they will diminish the effectiveness of the vaccine, researchers said.

The Ohio State University researchers have not yet published their full findings, but said a non-peer-reviewed study is forthcoming. They said in a press release that the new variant has three gene mutations “not previously seen together in” the coronavirus.

One of the new strains, found in just one patient in Ohio, contains a mutation identical to the now-dominant variant in the U.K., researchers said, noting that it “likely arose in a virus strain already present in the United States.” However, the “Columbus strain,” which the researchers said has become dominant in the city, includes “three other gene mutations not previously seen together in SARS-CoV2.”

“This new Columbus strain has the same genetic backbone as earlier cases we’ve studied, but these three mutations represent a significant evolution,” Dr. Dan Jones, vice chair of the division of molecular pathology at Ohio State, said in a statement. “We know this shift didn’t come from the U.K. or South African branches of the virus.”

The researchers identified the strain that’s become dominant in Columbus as COH.20G/501Y and said “the same mutation may be occurring independently in multiple parts of the world during the past few months.”

Peter Mohler, chief scientific officer at the Ohio State Wexner Medical Center and co-author of the forthcoming study, said there’s no data to indicate that the new strain will impact the effectiveness of vaccines.

“It’s important that we don’t overreact to this new variant until we obtain additional data,” he said in a statement. “We need to understand the impact of mutations on transmission of the virus, the prevalence of the strain in the population and whether it has a more significant impact on human health.

Representatives for the Centers for Disease Control and Prevention did not immediately return CNBC’s request for comment. The Ohio researchers will hold a press briefing on their discover at 11 a.m. ET.

This is breaking news. Check back here for updates.

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