The march was organized by two Annapolis High School students.
Gov. Larry Hogan said his wife, the country's first Korean American first lady, championed the operation.
Black residents made up nearly 50 percent of patients whose race was recorded.
The team tracked tweets that mention race and saw how they lined up with the cardiovascular disease cases in an area.
Campuses should remain open, he said.
The State's Attorney and public defender's offices are set to work together.
This university has ranked since 2011, and jumped six places from last year.
Maryland had confirmed 12 cases of COVID-19 as of Thursday afternoon.
The patient had no known exposure through travel or an infected individual.
Maryland Gov. Larry Hogan has confirmed four cases in Montgomery County and one in Harford County.