On 3/27/2020, Charles, Frederick, Harford counties crossed the 15 case threshold, as did Carroll county on 3/29. As of 3/29/2020, Allegany and Dorchester remain the only counties in Maryland with no reported confirmed cases.
I live in the DC area and want to know what the situation looks like locally. I’m not a fan of lists of numbers, or big red dots. They don’t tell me much. I want graphs showing changes over time. I want to see if things are trending better or worse.
Below are charts to help me ‘see’ what is happening. These are charts I cannot find anywhere else and compliment the other sources provided at the bottom of the post. The data is from credible sources, cited below.