COVID-19 – Charts: March 23-29, 2020

COVID-19 charts from March 23-March 29, 2020.

Below are charts from March 23 to March 29, 2020. See charts from the current week.


Maryland: COVID-19 Total Cases - By County
Maryland: COVID-19 Total Cases – By County

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.

DMV Region: COVID-19 Total Cases - By Locale
DMV Region: COVID-19 Total Cases – By Locale

The above chart covers the Washington DC, Maryland, and Virginia region (the DMV). Specifically, it includes Washington DC and the Maryland and Virginia counties that are within a reasonable commuting radius of the city.

Maryland: COVID-19 Total Cases - By Age Range
Maryland: COVID-19 Total Cases – By Age Range

Maryland changed the way they provided case data by age range on 3/27. I’ll post a chart reflecting new data beginning Monday, 3/30/2020.

Maryland: COVID-19 Total Cases
Maryland: COVID-19 Total Cases
US: COVID-19 Total Cases
US: COVID-19 Total Cases
DMV Region: COVID-19 New Cases - By Locale
DMV Region: COVID-19 New Cases – By Locale
Maryland: COVID-19 New Cases - By Age Range
Maryland: COVID-19 New Cases – By Age Range

Maryland changed the way they provided case data by age range on 3/27. I’ll post a chart reflecting new data beginning Monday, 3/30/2020.

Maryland: COVID-19 New Cases
Maryland: COVID-19 New Cases
US: COVID-19 New Cases
US: COVID-19 New Cases

Data sources for the charts above:

COVID-19 – Charts: March 17-22, 2020

COVID-19 charts from March 17-March 22, 2020.

Below are charts from March 17 to March 22, 2020. See charts for the current week.

Maryland COVID-19 Cases by County
Maryland COVID-19 Cases by County

As of 1300 on 03/22/2020, Allegany, Dorchester, Garrett, Kent, and Queen Anne’s counties have reported zero cases of COVID-19.

Maryland COVID-19 Cases by Age Range
Maryland COVID-19 Cases by Age Range

On 03/19 Maryland reported the first case of COVID-19 in an individual under the age of 19. The victim is a 5-year old girl from Howard County.

Maryland COVID-19 Aggregated Data
Maryland COVID-19 Aggregated Data

On 03/18 Maryland suffered its first casualty to the COVID-19 disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. The individual was a Prince George’s County resident in his 60s who suffered from an underlying medical condition.

United States COVID-19 Aggregated Data
United States COVID-19 Aggregated Data

Note – CDC does not publish data on Saturday or Sunday. On 3/23/2020 I will switch to using data from John’s Hopkins University.

Data sources for the charts above:

COVID-19 – Charts

COVID-19 charts that I cannot find anywhere else.

This page is updated daily (generally between 10 a.m. and noon ET).

The week of 5/11 the charts shown here were overhauled. The focus changed from total counts to new cases. Also, there is an increased focus on impacts by age range and gender. Another new indicator – the numbers of individuals hospitalized, and whether they were in acute or intensive car. Trend lines are added to certain charts that, hopefully, show downward trends.


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.

There are, in general, two charts for each set of data. The first chart shows total cases over time, the second will show new cases over that same period. The second is, perhaps, more useful – as it will show whether or not infection rates are trending downward.

Maryland has begun reporting deaths by age range. However, I cannot find a reliable source for US-wide information on cases and deaths aggregated by age range. This information would be very useful to critical infrastructure owners and operators as they look to assess the impact of COVID-19 on critical staffing levels.

Maryland at a High Level

These charts show three key views of the state of affairs in Maryland. First shows the number of new cases and new deaths daily over the past 14 days across the state. A trend line is included to, hopefully, show a downward trend. The second shows new cases at the county level. The third shows the number of individuals currently hospitalized, broken down to show those in intensive or acute care.

Maryland Cases by Age Range and Sex

These charts show the number of new cases and new deaths in specific age demographics and by sex.

The DMV Region

This chart covers a portion of the Washington DC, Maryland, and Virginia region (the DMV). Specifically, it includes Washington DC and the Maryland and Virginia counties that are within a reasonable commuting radius of the city.

The U.S. – How are we doing over time?

This chart shows the number of new cases and new deaths daily over the past 14 days across the United States. A trend line is included to, hopefully, show a downward trend.


References and resources

Data sources for the charts above: