The District of Columbia, Maryland and Virginia combined have at least 21 COVID-19 cases.
American University has also become the first college campus in the region to suspend in-person classes.
As the region buckles down for the COVID-19 outbreak, are commuters worried about using public transportation?
The Washington Metropolitan Area Transit Authority (WMATA) says they are disinfecting equipment and announced "Phase two" response measures for riders and employees.
This means WMATA will provide "hand sanitizer supplies for employees, monitor employee absences and maintain more communication."
WMATA also has a Pandemic Task Force, which is working on plans in case they need to move to a "Phase 3" response plan.
The task force has a total of four phases.
D.C.'s Transit Authority also stresses to stay home if you are sick and use tissue when you cough or sneeze. And if you suspect you have COVID-19 and are going to the doctor, do not ride public transportation.
According to the Washington Post, there has been no evidence of COVID-19 transmission through D.C.'s public transportation systems.