The Centers for Disease Control and Prevention is tracking a new COVID-19 variant that – for now – appears to be clustered in a handful of midwestern states.

EU.1.1, a subvariant of the omicron strain, currently accounts for about 1.7% of all U.S. cases, according to the latest CDC figures. In six states, however – Colorado, Montana, North Dakota, South Dakota, Utah and Wyoming – it now accounts for 8.7% of cases. Utah accounts for the greatest number of infections with nearly 100 cases of EU. 1.1 reported by the state’s labs.

There does not appear to be a large uptick in hospital admissions or emergency room visits in Utah due to EU.1.1 and reported nursing home cases there also remain low, according to a report by CBS News.

It is too early to determine if EU.1.1 will lead to new or different symptoms in the U.S.

The largest COVID strain in the U.S. remains XBB.1.5, which accounts for about 27% of infections. XBB.1.9.2 and XBB.1.9.1 combine for about 24.4% of cases.

The CDC continues to stress that new variant can and will occur.

“SARS-CoV-2, the virus that causes COVID-19, is constantly changing and new variants of the virus are expected to occur. Sometimes new variants emerge and disappear. Other times, new variants persist. Numerous variants of the virus that causes COVID-19 are being tracked in the United States and globally during this pandemic,” the agency said on its website.