Prince George’s County will require grocery shoppers and county bus riders to wear masks or face masks starting on April 15, County Executive Angela Alsobrooks wrote in a newsletter Saturday.

The order will also include pharmacies and other large retailers, Alsobrooks wrote, and it will require riders on “TheBus,” the county’s transit system, to cover their faces.

Businesses will also be required to maintain social distancing indoors and outdoors after Alsobrooks signs an executive order, she wrote in the letter to the community.

The order comes after Montgomery County and Washington, D.C. officials made similar orders this week.

Prince George’s County has been the Maryland county hardest hit by the novel coronavirus, with 55 deaths and more than 2,000 confirmed cases, according to data from the state health department.