A yearlong outbreak of tuberculosis in the Kansas City, Kansas area has taken local experts aback, even if it does not appear to be the largest outbreak of the disease in U.S. history as a state health official claimed last week.

Kansas is currently experiencing a large tuberculosis outbreak, but federal health officials are countering the claim it’s a U.S. record.

A wave of tuberculosis cases hitting the Kansas City, Kansas, metro area has become the largest documented TB outbreak in the United States since monitoring began in the 1950s, according to the state health department.