Fauci says there are early signs coronavirus outbreaks are brewing in Ohio, Indiana, Kentucky and Tennessee

White House health advisor Dr. Anthony Fauci said Tuesday there are early signs that a coronavirus outbreak could be brewing in Indiana, Ohio, Tennessee and Kentucky.

The so-called positivity rate, or the percentage of tests run that are positive, appears to be rising in those states — an early indication that the outbreak is worsening, Fauci said. While President Donald Trump and others have blamed the rise in cases in the U.S. on increased testing, a growing positivity rate can’t be blamed on increased testing.

“That’s a surefire sign that you’ve got to be really careful,” Fauci, the director of the National Institute of Allergy and Infectious Diseases, said during an interview with ABC’s “Good Morning America.”