Covid Tracker

Below are the current cumulative cases and deaths in Maryland, the DC area, and selected other counties that are important to me.

Notes and Caveats

Doubling Time refers to the prejected number of days that cases or deaths will be expected to double. The longer the timeframe the better. As a comparison:

  • The sharpest growth rates in cases in Japan, Singapore, and Hong Kong came when cases were doubling after 7+ days, while China, Spain, and Italy were doubling very 2 days.
  • At their worst, deaths in Lombardy (N. Italy), Madrid, and Catalonia (Spain) were doubling in 1.5 days. Wuhan was doubling about every 2 - 2.5 days

Cases provide more information to be able to judge the rate of spread, but the availability of test kits varies by state and county, so the data is unreliable.

Deaths are (thankfully) low in most counties, so predicting a rate of growth is difficult. Take Doubling Times with a healthy grain of salt until the cumulative deaths reach 10 - 20.

Cumulative Cases

Maryland (top 20 counties)

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 94581 95503 96258 96843 97384 98160 98875 95.16
Prince George's 23554 23697 23832 24009 24098 24301 24442 119.46
Montgomery 18260 18392 18489 18558 18641 18752 18819 194.00
Baltimore 13060 13257 13400 13374 13463 13593 13699 88.89
Baltimore City 12375 12547 12704 12893 12991 13063 13210 61.60
Anne Arundel 7295 7361 7416 7450 7479 7528 7564 144.94
Howard 3809 3846 3881 3913 3941 3967 4009 65.47
Frederick 3055 3067 3082 3093 3118 3154 3173 115.06
Charles 2000 2024 2040 2067 2084 2102 2119 85.71
Harford 1934 1968 1994 2012 2034 2055 2085 47.48
Carroll 1537 1546 1554 1567 1572 1583 1596 84.40
Wicomico 1324 1338 1348 1356 1361 1374 1381 136.05
Washington 1007 1012 1018 1029 1041 1066 1090 30.79
St. Mary's 965 983 999 1003 1012 1022 1039 41.67
Calvert 685 697 707 713 715 724 725 501.84
Cecil 698 702 706 708 714 715 719 123.90
Worcester 682 694 694 697 704 707 710 163.35
Queen Anne's 422 431 434 433 440 446 468 14.05
Caroline 445 451 453 453 454 455 457 157.69
Talbot 394 400 402 403 404 411 412 284.88

District of Columbia

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
District of Columbia 12653 12753 12807 12896 12959 13024 13118 96.04
State Total 12653 12753 12807 12896 12959 13024 13118 96.04
Out of DC 0 0 0 0 0 0 0 0.00
Unassigned 0 0 0 0 0 0 0 0.00

Northern Virginia

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 99189 100086 100749 101745 102521 103622 104838 59.07
Fairfax 16302 16376 16445 16544 16642 16703 16816 102.46
Arlington 3062 3077 3091 3105 3118 3134 3176 51.72
Alexandria 2949 2964 2976 2995 3014 3020 3050 69.78

Delaware Beaches

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 15502 15575 15634 15699 15765 15967 16340 29.67
Sussex 5821 5839 5848 5867 5881 5928 6167 17.19

South Dakota

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 9477 9605 9663 9713 9815 9897 10024 54.02
Minnehaha 4376 4422 4437 4457 4498 4521 4561 78.34
Pennington 881 891 896 898 910 915 924 70.47
Brookings 133 137 139 140 142 143 145 49.56
Davison 94 97 97 96 96 99 99 0.00

Massachusetts

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 120711 121040 121315 121707 122000 122319 122531 399.93
Suffolk 21778 21849 21929 22017 22017 22017 22017 0.00
Hampshire 1170 1174 1179 1184 1184 1184 1184 0.00

New York

New York county includes all five boroughs (including Kings, Queens, Bronx, and Richmond counties).
2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 420345 420860 421336 422003 422703 423440 424167 403.72
New York 227584 227832 228069 228343 228729 229167 229534 432.82
Nassau 43628 43655 43690 43724 43761 43795 43840 674.59
Westchester 36180 36205 36233 36272 36324 36357 36402 560.02

Cumulative Deaths

Maryland (top 20 counties)

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 3577 3585 3591 3604 3612 3620 3631 228.11
Montgomery 802 803 803 803 806 807 808 559.37
Prince George's 751 753 755 761 764 766 766 0.00
Baltimore 561 563 563 566 567 572 574 198.24
Baltimore City 428 428 430 431 434 435 438 100.51
Anne Arundel 222 225 225 227 228 228 228 0.00
Frederick 121 121 121 121 121 121 121 0.00
Carroll 117 117 117 117 118 118 118 0.00
Howard 110 110 112 112 112 112 115 25.88
Charles 91 91 91 91 91 92 92 0.00
Harford 69 69 69 69 69 69 69 0.00
St. Mary's 52 52 52 52 52 52 52 0.00
Wicomico 45 45 45 45 45 45 45 0.00
Washington 31 31 31 31 31 31 31 0.00
Cecil 30 30 30 30 30 30 30 0.00
Calvert 28 28 28 28 28 28 28 0.00
Queen Anne's 25 25 25 25 26 26 26 0.00
Kent 23 23 23 23 23 23 23 0.00
Worcester 20 20 20 20 20 20 20 0.00
Allegany 18 18 18 18 18 18 18 0.00

District of Columbia

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
District of Columbia 590 591 591 593 593 594 594 0.00
State Total 590 591 591 593 593 594 594 0.00
Out of DC 0 0 0 0 0 0 0 0.00
Unassigned 0 0 0 0 0 0 0 0.00

Northern Virginia

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 2322 2326 2327 2344 2352 2363 2370 233.99
Fairfax 529 529 529 529 529 530 531 367.37
Arlington 135 135 135 135 135 135 135 0.00
Alexandria 60 60 60 60 60 60 61 41.59

Delaware Beaches

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 590 591 591 591 592 593 593 0.00
Sussex 192 192 192 192 192 192 192 0.00

South Dakota

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 146 146 146 146 147 148 150 51.29
Minnehaha 68 68 68 68 68 68 68 0.00
Pennington 32 32 32 32 32 32 33 22.18
Brookings 1 1 1 1 1 1 1 0.00
Davison 1 1 1 1 1 1 1 0.00

Massachusetts

2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 8721 8735 8741 8751 8769 8790 8804 435.20
Suffolk 1073 1074 1074 1076 1076 1076 1076 0.00
Hampshire 129 129 129 130 130 130 130 0.00

New York

New York county includes all five boroughs (including Kings, Queens, Bronx, and Richmond counties).
2020-08-08 2020-08-09 2020-08-10 2020-08-11 2020-08-12 2020-08-13 2020-08-14 Doubling Time
State Total 32768 32774 32781 32787 32797 32805 32827 1033.58
New York 23575 23580 23586 23592 23602 23610 23615 3273.04
Nassau 2194 2194 2195 2195 2195 2195 2195 0.00
Westchester 1447 1447 1447 1447 1447 1447 1447 0.00

Sources