University of Notre Dame researchers are continuing to study the spread of coronavirus, along with its effects.

According to a recent study, thousands in the U.S. were infected with the virus by the time officials caught the first case in Washington. WSBT reports there were more cases of the virus than originally thought.

Notre Dame Assistant Professor Alex Perkins says that because the country was behind with testing, “things got out of hand.” He says large-scale testing would’ve been vital to help contain the spread.

A Notre Dame lab is now studying the effect lock downs and school closures will have on the spread of the virus.