COVID-19 Update (Summary): September 13, 2020

1. Caveats and Comments
1
Overview:
This is my analysis, not Stanford’s. My goal is to understand the trajectory of COVID. It is not confidential and can be freely shared. The R program code is
available at https://github.com/StevenLShafer/COVID19/. The daily analysis are available at https://1drv.ms/u/s!AuOyHP_aTIy7rowrt2AjGpWm_frnEQ?e=KBcNbh.
You are welcome to use the R code on GitHub for any purpose.
I am attempting to keep the analysis and commentary apolitical. I am now including partisan lean as a metric to help understand the epidemic. I occasionally point
out misrepresentations by government officials. I occasionally point out where government recommendations have placed Americans at increasing risk.
I try to provide a daily update in the morning, except Sundays. My analysis my be delayed by my clinical responsibilities as a Stanford anesthesiologist.
There is a lot of information on the figures. If something isn’t clear, please see the explanation on slide 2.
Data sources:
• USA Case Data: https://github.com/CSSEGISandData/COVID-19/raw/master/csse_covid_19_data/csse_covid_19_time_series/time_series_covid19_confirmed_US.csv
• USA Death Data: https://github.com/CSSEGISandData/COVID-19/raw/master/csse_covid_19_data/csse_covid_19_time_series/time_series_covid19_deaths_US.csv
• USA Testing and Hospitalization Data: https://raw.githubusercontent.com/COVID19Tracking/covid-tracking-data/master/data/states_daily_4pm_et.csv
• Global Case Data: https://github.com/CSSEGISandData/COVID-19/raw/master/csse_covid_19_data/csse_covid_19_time_series/time_series_covid19_confirmed_global.csv
• Global Death Data: https://github.com/CSSEGISandData/COVID-19/raw/master/csse_covid_19_data/csse_covid_19_time_series/time_series_covid19_deaths_global.csv
• Global Testing Data: https://raw.githubusercontent.com/owid/covid-19-data/master/public/data/owid-covid-data.csv
• Mobility Data: https://www.gstatic.com/covid19/mobility/Global_Mobility_Report.csv
• Partisan Lean: MIT Election Data and Science Lab: https://doi.org/10.7910/DVN/VOQCHQ/HEIJCQ
• Ensemble Model: https://github.com/reichlab/covid19-forecast-hub/raw/master/data-processed/COVIDhub-ensemble/2020-xx-xx-COVIDhub-ensemble.csv
Models:
1. Future projections of case numbers are based on the Gompertz function (https://en.wikipedia.org/wiki/Gompertz_function): log 𝑐𝑢𝑚𝑢𝑙𝑎𝑡𝑖𝑣𝑒 𝑐𝑎𝑠𝑒𝑠 =
𝑐𝑢𝑟𝑟𝑒𝑛𝑡 𝑐𝑎𝑠𝑒𝑠 + 𝑚𝑎𝑥𝑖𝑚𝑢𝑚 𝑐𝑎𝑠𝑒𝑠 − 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 𝑐𝑎𝑠𝑒𝑠 1 − 𝑒−𝑘 𝑡 . This is a naïve asymptotic model. k is the rate constant, such that log(2) / k = time to 50%
rise. t is the number of days. Wikipedia The Gompertz function is estimated from the last 3 weeks of data for cumulative cases (red dots in the figures).
Deaths are predicted from a log linear regression of deaths over the past 21 days. For the US, and individual states, I am also including the 98% prediction
interval from the COVID-19 Forecast Hub (https://covid19forecasthub.org/).
2. The rate of change in daily cases and deaths is the slope of delta cases / day over the last 14 days, divided by the average number of cases.
Locations
The locations for the modeling are where Pamela and I have family and friends, locations of interest to friends and colleagues, or countries in the news (e.g.,
China, South Korea, Sweden, Brazil) or with significant economic impact on the United States (e.g., Japan, Canada, Mexico). Locations are easy to add.
Stay safe, well, resilient, and kind.
Steve Shafer
steven.shafer@Stanford.edu

2. 2,586,092
152,804
1
10
100
1,000
10,000
100,000
1,000,000
10,000,000
100,000,000
Actual(points)/Predicted(line)
Phase
Pre-Model
Modeled
Deaths
Tests
USA projection as of 2020-05-27
0
10,000
20,000
30,000
0
2,000
4,000
6,000
Cases/Day
Deaths/Day
Cases: 1,662,302 (32,123) -- Deaths: 98,220 (829) -- Case Mortality: 5.9% -- Daily Change in Cases: -0.5%
Explanation of the Figures
2
Brown dots:
cumulative tests
Red dots: cumulative cases
used to estimate Gompertz
function, presently set to last
3 weeks
Red line: predicted cumulative
cases based on the Gompertz
function estimated from the red
dots
Red number: total cases
on June 30th, based on
the Gompertz function
estimated from the red
dots
Black number: total
Deaths on July 31th,
based on log-linear
regression of the past
21 days
Black line: predicted
cumulative deaths, based
on a log linear regression
of deaths over past 21
days.
Axis for deaths / day, usually
1/10th of the axis for cases /
day on the left side of the
figure.
Green line: linear regression
over 8 days, used to calculate
percent increase / decrease
(see below)
Daily change in cases,
calculated as the slope of the
green line (above left) /
number of new cases
yesterday.
Case mortality:
cumulative deaths
/ cumulative cases.
Cases / day calculated
from cumulative cases
used to estimate the
Gompertz function
Cases / day calculated
from cumulative cases
not used to estimate the
Gompertz function
Deaths / day,
axis is on the left
Blue line: today
Blue dots: cumulative cases not
used to estimate Gompertz
function
Cumulative cases
(yesterday’s cases)
and cumulative deaths
(yesterday’s deaths)
Axis for cases / day.
Axis for deaths / day
appears to the right.
Geographic
location
Date of analysis,
also shown as
blue vertical line
below
Purple wedge: 98% ensemble
prediction interval from COVID-19
Forecast Hub (USA and US
States only)

3. Worldwide
33,686,722
1,041,156
1
10
100
1,000
10,000
100,000
1,000,000
10,000,000
100,000,000
Cumulative
Phase
Pre-Model
Modeled
Deaths
Worldwide projection as of 2020-09-13
0
100,000
200,000
300,000
0
5,000
10,000
15,000
Cases/Day
Deaths/Day
Cases: 28,758,305 (277,623) -- Deaths: 920,215 (4,875) -- Case Mortality: 3.2% -- Daily Change: +0.8% Cases, +0.8% Deaths
2020-09-13 Summary: 3

4. USA
7,173,479
211,090
1
10
100
1,000
10,000
100,000
1,000,000
10,000,000
100,000,000
Cumulative
Phase
Pre-Model
Modeled
Deaths
Tests
USA projection as of 2020-09-13
Mother'sDay
MemorialDay
July4th
July15,2020
LaborDay
0
20,000
40,000
60,000
0
1,000
2,000
3,000
Cases/Day
Deaths/Day
Cases: 6,485,214 (41,471) -- Deaths: 193,693 (714) -- Case Mortality: 3.0% -- Daily Change: -0.4% Cases, -0.3% Deaths
2020-09-13 Summary: 4

5. Non-authoritarian Asian ensemble
118,134
2,248
1
10
100
1,000
10,000
100,000
1,000,000
10,000,000
100,000,000
Cumulative
Phase
Pre-Model
Modeled
Deaths
Tests
Japan, South Korea, Thailand, and Vietnam (Population = 328 MM)
Non-authoritarian Asian ensemble projection as of 2020-09-13
0
500
1,000
1,500
0
20
40
60
80
Cases/Day
Deaths/Day
Cases: 101,915 (781) -- Deaths: 1,892 (16) -- Case Mortality: 1.9% -- Daily Change: -2.2% Cases, -0.5% Deaths
2020-09-13 Summary: 5

6. Western Europe
2,431,464
157,670
1
10
100
1,000
10,000
100,000
1,000,000
10,000,000
100,000,000
Cumulative
Phase
Pre-Model
Modeled
Deaths
Tests
Belgium, France, Germany, Greece, Italy, Portugal, Spain, Netherlands, Luxembourg, and the UK (Population = 344MM)
Western Europe projection as of 2020-09-13
0
20,000
40,000
60,000
0
1,000
2,000
3,000
Cases/Day
Deaths/Day
Cases: 2,042,536 (9,190) -- Deaths: 155,830 (28) -- Case Mortality: 7.6% -- Daily Change: +1.9% Cases, +1.8% Deaths
2020-09-13 Summary: 6

7. Worldwide cases
USA
India
Brazil
Russia
Peru
Colombia
Mexico
SouthAfrica
Spain
Argentina
Chile
Iran
France
UnitedKingdom
Bangladesh
SaudiArabia
Pakistan
Turkey
Iraq
Italy
Germany
Philippines
Indonesia
Ukraine
Israel
Canada
Bolivia
Ecuador
Kazakhstan
DominicanRepublic
Romania
Egypt
Belgium
China
Sweden
Netherlands
Morocco
Guatemala
Japan
Belarus
Poland
Honduras
Ethiopia
Portugal
Venezuela
Nigeria
Nepal
Algeria
Uzbekistan
Switzerland
Ghana
Kyrgyzstan
Afghanistan
Azerbaijan
Kenya
CzechRepublic
Austria
Serbia
Paraguay
ElSalvador
Australia
Libya
SouthKorea
Cameroon
Denmark
USA
0
2,000,000
4,000,000
6,000,000
1 6 11 16 21 26 31 36 41 46 51 56 61 66
Rank
Totalcasestodate
Worldwide cases
Excludes countries with population < 5,000,000
2020-09-13 Summary: 7

8. Worldwide cases
Chile
Peru
Brazil
Israel
USA
Colombia
Spain
Argentina
SouthAfrica
Bolivia
SaudiArabia
DominicanRepublic
Sweden
Iraq
Honduras
Belgium
Kyrgyzstan
Ecuador
Belarus
Russia
Kazakhstan
France
Guatemala
Switzerland
UnitedKingdom
Iran
Mexico
Portugal
Netherlands
Italy
Azerbaijan
Romania
Serbia
Canada
India
Austria
Paraguay
Turkey
ElSalvador
Denmark
Libya
CzechRepublic
Ukraine
Germany
Philippines
Bulgaria
Morocco
Venezuela
Bangladesh
Poland
Ghana
Nepal
Pakistan
Uzbekistan
Finland
Algeria
Afghanistan
Australia
Tajikistan
Greece
Egypt
Hungary
Zambia
Cameroon
Senegal
USA
None
1 in 200
1 in 100
1 in 67
1 in 50
1 in 40
1 in 33
1 6 11 16 21 26 31 36 41 46 51 56 61 66
Rank
Totalcasestodate
Worldwide cases
Excludes countries with population < 5,000,000
2020-09-13 Summary: 8

9. Average new cases over past 7 days
Israel
Argentina
Spain
Peru
Colombia
Brazil
Iraq
Paraguay
Libya
USA
France
Chile
CzechRepublic
DominicanRepublic
Bolivia
India
Netherlands
Belgium
Austria
Ukraine
Morocco
Hungary
Romania
Honduras
Switzerland
UnitedKingdom
Mexico
Portugal
Denmark
Guatemala
Venezuela
Nepal
Russia
SouthAfrica
Philippines
Iran
Slovakia
SaudiArabia
Italy
Tunisia
Greece
Turkey
Sweden
Belarus
Canada
Azerbaijan
Uzbekistan
Bulgaria
Germany
Jordan
Kyrgyzstan
Indonesia
ElSalvador
Poland
Bangladesh
Ethiopia
Serbia
Zambia
Algeria
Finland
Zimbabwe
Uganda
Tajikistan
Kazakhstan
Guinea
USA
None
1 in 10,000
1 in 5,000
1 in 3,333
1 in 2,500
1 in 2,000
1 6 11 16 21 26 31 36 41 46 51 56 61 66
Rank
Averagecases/day
Average new cases over past 7 days
Excludes countries with population < 5,000,000
2020-09-13 Summary: 9

10. Worldwide deaths
USA
Brazil
India
Mexico
UnitedKingdom
Italy
France
Peru
Spain
Iran
Colombia
Russia
SouthAfrica
Chile
Argentina
Ecuador
Belgium
Germany
Canada
Indonesia
Iraq
Bolivia
Turkey
Pakistan
Netherlands
Sweden
Egypt
China
Bangladesh
Philippines
SaudiArabia
Romania
Ukraine
Guatemala
Poland
Honduras
Switzerland
DominicanRepublic
Portugal
Kazakhstan
Algeria
Morocco
Japan
Afghanistan
Israel
Nigeria
Kyrgyzstan
Ethiopia
Sudan
Australia
ElSalvador
Austria
Belarus
Serbia
Bulgaria
Hungary
Denmark
Kenya
Yemen
Azerbaijan
Paraguay
Venezuela
CzechRepublic
Cameroon
Uzbekistan
USA
0
50,000
100,000
150,000
200,000
1 6 11 16 21 26 31 36 41 46 51 56 61 66
Rank
Totaldeathstodate
Worldwide deaths
Excludes countries with population < 5,000,000
2020-09-13 Summary: 10

11. Worldwide deaths
Peru
Belgium
Bolivia
Ecuador
Spain
Chile
UnitedKingdom
Brazil
Sweden
Mexico
Italy
USA
Colombia
France
Netherlands
Iran
SouthAfrica
Canada
Argentina
Switzerland
Honduras
Iraq
Guatemala
DominicanRepublic
Kyrgyzstan
Romania
Portugal
Israel
SaudiArabia
Russia
Germany
Denmark
ElSalvador
Kazakhstan
Bulgaria
Serbia
Austria
Turkey
Belarus
Paraguay
Ukraine
Azerbaijan
Egypt
India
Hungary
Finland
Poland
Libya
Afghanistan
Algeria
Morocco
CzechRepublic
Philippines
Australia
Pakistan
Indonesia
Sudan
Bangladesh
Greece
Zambia
Nicaragua
Yemen
Haiti
Cameroon
Senegal
USA
None
1 in 5,000
1 in 2,500
1 in 1,667
1 in 1,250
1 in 1,000
1 6 11 16 21 26 31 36 41 46 51 56 61 66
Rank
Totaldeathstodate
Worldwide deaths
Excludes countries with population < 5,000,000
2020-09-13 Summary: 11

12. Average daily deaths over past 7 days
Ecuador
Bolivia
Colombia
Argentina
Peru
Mexico
Brazil
Chile
Iraq
USA
Paraguay
DominicanRepublic
SouthAfrica
Israel
Iran
Libya
Romania
Honduras
Guatemala
Ukraine
Spain
SaudiArabia
India
Morocco
Bulgaria
Russia
Philippines
Turkey
ElSalvador
Belarus
Indonesia
Kazakhstan
Australia
France
Portugal
Venezuela
CzechRepublic
Austria
Nepal
Greece
Poland
Belgium
Azerbaijan
Algeria
Tunisia
Bangladesh
Zambia
Uzbekistan
Egypt
Italy
Zimbabwe
UnitedKingdom
Ethiopia
Serbia
Angola
Syria
Netherlands
Sweden
Hungary
Togo
Jordan
Switzerland
Canada
Haiti
Kenya
USA
None
1 in 100,000
1 in 50,000
1 in 33,333
1 in 25,000
1 6 11 16 21 26 31 36 41 46 51 56 61 66
Rank
Averagedeaths/day
Average daily deaths over past 7 days
Excludes countries with population < 5,000,000
2020-09-13 Summary: 12

13. CV for Cases and Deaths
ITAGBRSWE
FIN BELDEU
CHEDNK FRANLDCAN
MLI BFA
AUTPAK CMRAFG MYS ESP HUNBENSDN PRT
TCDSSD SLE
SOM
SRBCODEGY YEM CIVMWI NGAAZETJK NICLKA CZEHTI USACHL
ZMBPOLIRN PERDZA KORSENTURRUS
GHA BRABLR GTM SVKCUBMEXSAU MDG GINKAZ KENBGDSLVZAF JPN GRCIRQDOM HND ROU IDNBGR TGO AGOCOL UKRINDISRVNM PHLUZBKGZ VENZWE PNGMOZ ETH TUNBOL ARG JORAUS
ECU SYR LBYMARRWA
NPL UGA MMRPRY
0.001
0.010
0.100
1.000
0.010.01 0.10 1.00
Cases CV
DeathsCV
Coefficient of variation for cases and deaths as of 2020-09-13
CV calculated over last 28 days
2020-09-13 Summary: 13

14. Mortality Trends
0
2
4
6
8
10
12
14
USCaseRateMortality
Mortality Type:
13 day rolling median
Cumulative
Daily Raw
Daily vs. Cumulative US Case Rate Mortality
Last week excluded because deaths are often backdated
2020-09-13 Summary: 14

15. Change in New Cases per Day
New cases are:
Increasing > +3%
Increasing between +1% and +3%
No Change (-1% to +1%)
Decreasing between -1% and -3%
Decreasing > -3%
New cases by state as of 2020-09-13
2020-09-13 Summary: 15

16. Cases as a Percent of Peak Cases
HI TX FL
OK LA MS AL GA
AZ NM KS AR TN NC SC DC
CA UT CO NE MO KY WV VA MD DE
OR NV WY SD IA IN OH PA NJ CT RI
WA ID MT ND MN IL MI NY MA
WI VT NH
AK ME
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
PercentofPeak
Daily Cases as a Percent of Peak Cases
2020-09-13 Summary: 16

17. Change in New Deaths per Day
New deaths are:
Increasing > +0.5%
Increasing between +0.1% and +0.5%
No Change (-0.1% to +0.1%)
Decreasing between -0.1% and -0.5%
Decreasing > -0.5%
New deaths by state as of 2020-09-13
2020-09-13 Summary: 17

18. Deaths as a Percent of Peak Deaths
HI TX FL
OK LA MS AL GA
AZ NM KS AR TN NC SC DC
CA UT CO NE MO KY WV VA MD DE
OR NV WY SD IA IN OH PA NJ CT RI
WA ID MT ND MN IL MI NY MA
WI VT NH
AK ME
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
0
25
50
75
100
PercentofPeak
Daily Deaths as a Percent of Peak Deaths
2020-09-13 Summary: 18

19. Change in cases vs change in deaths
AL
AK
AZ
AR
CA
CO
CT DE
DC
FL
GA
HI
ID
IL
IN
IA
KS
KY
LA
ME
MD
MA
MI
MN
MS
MO
MT
NE
NV
NHNJ
NM
NY
NC
ND
OH
OK
OR
PA
RI
SC
SD
TN
TX
UT
VT
VA
WA
WV
WI
WY-6
-3
0
3
6
-20 -10 0
Change in cases (%/day)
Changeindeaths(%/day)
Change in cases vs change in deaths over last 14 days as of 2020-09-13
2020-09-13 Summary: 19

20. Total US COVID-19 Cases
California
Texas
Florida
NewYork
Georgia
Illinois
Arizona
NewJersey
NorthCarolina
Tennessee
Louisiana
Pennsylvania
Alabama
Ohio
Virginia
SouthCarolina
Massachusetts
Michigan
Maryland
Indiana
Missouri
Mississippi
Wisconsin
Minnesota
Washington
Iowa
Nevada
Arkansas
Oklahoma
Colorado
Utah
Kentucky
Connecticut
Kansas
Nebraska
Idaho
Oregon
NewMexico
RhodeIsland
Delaware
SouthDakota
NorthDakota
DistrictofColumbia
WestVirginia
Hawaii
Montana
NewHampshire
Alaska
Maine
Wyoming
Vermont
0
200,000
400,000
600,000
800,000
1 6 11 16 21 26 31 36 41 46 51
Rank
Totalcases
Masks
No
Yes
Governor
aa
Democratic
Republican
Total US COVID-19 Cases
p masks as of July 20, 2020: 0.47, p governor: 0.82. NB: association != causation.
2020-09-13 Summary: 20

21. Total US COVID-19 Cases
Louisiana
Florida
Mississippi
Arizona
Alabama
Georgia
SouthCarolina
Tennessee
Nevada
Iowa
Texas
Arkansas
NewYork
NewJersey
RhodeIsland
Illinois
DistrictofColumbia
NorthDakota
Nebraska
Idaho
Delaware
California
Maryland
Massachusetts
SouthDakota
Utah
NorthCarolina
Oklahoma
Kansas
Missouri
Virginia
Indiana
Connecticut
Wisconsin
Minnesota
NewMexico
Kentucky
Michigan
Ohio
Pennsylvania
Colorado
Washington
Alaska
Montana
Hawaii
Wyoming
WestVirginia
Oregon
NewHampshire
Maine
Vermont
None
1 in 100
1 in 50
1 in 33
1 6 11 16 21 26 31 36 41 46 51
Rank
TotalCases
Masks
No
Yes
Governor
aa
Democratic
Republican
Total US COVID-19 Cases
p masks as of July 20, 2020: 0.42, p governor: 0.058. NB: association != causation.
2020-09-13 Summary: 21

22. Average US COVID-19 cases over the past
7 days
NorthDakota
SouthDakota
Arkansas
Missouri
Iowa
Oklahoma
Tennessee
Alabama
Wisconsin
SouthCarolina
Georgia
Nebraska
Mississippi
Illinois
Kansas
Idaho
Utah
Kentucky
Louisiana
Delaware
Florida
Indiana
Virginia
Texas
NorthCarolina
Alaska
Montana
WestVirginia
Minnesota
Nevada
Hawaii
Maryland
California
Ohio
Michigan
RhodeIsland
Wyoming
Pennsylvania
Arizona
Colorado
DistrictofColumbia
Washington
Oregon
NewMexico
NewJersey
NewYork
Connecticut
NewHampshire
Maine
Vermont
Massachusetts
None
1 in 10,000
1 in 5,000
1 in 3,333
1 in 2,500
1 6 11 16 21 26 31 36 41 46 51
Rank
NewCases/Day
Masks
No
Yes
Governor
aa
Democratic
Republican
Average US COVID-19 cases over the past 7 days
p masks as of July 20, 2020: 0.0012, p governor: 0.0027. NB: association != causation.
2020-09-13 Summary: 22

23. Total US COVID-19 Deaths
NewYork
NewJersey
Texas
California
Florida
Massachusetts
Illinois
Pennsylvania
Michigan
Georgia
Arizona
Louisiana
Connecticut
Ohio
Maryland
Indiana
NorthCarolina
SouthCarolina
Virginia
Mississippi
Alabama
Tennessee
Washington
Colorado
Minnesota
Missouri
Nevada
Iowa
Wisconsin
RhodeIsland
Kentucky
Arkansas
Oklahoma
NewMexico
DistrictofColumbia
Delaware
Kansas
Oregon
Nebraska
NewHampshire
Utah
Idaho
WestVirginia
SouthDakota
NorthDakota
Maine
Montana
Hawaii
Vermont
Alaska
Wyoming
0
10,000
20,000
30,000
1 6 11 16 21 26 31 36 41 46 51
Rank
TotalDeaths
Masks
No
Yes
Governor
aa
Democratic
Republican
Total US COVID-19 Deaths
p masks as of July 20, 2020: 0.063, p governor: 0.26. NB: association != causation.
2020-09-13 Summary: 23

24. Total US COVID-19 Deaths
NewJersey
NewYork
Massachusetts
Connecticut
Louisiana
RhodeIsland
Mississippi
DistrictofColumbia
Arizona
Michigan
Illinois
Maryland
Delaware
Pennsylvania
Georgia
SouthCarolina
Florida
Indiana
Texas
Alabama
Nevada
NewMexico
Iowa
Ohio
California
Minnesota
Colorado
Arkansas
NewHampshire
Virginia
Tennessee
NorthCarolina
Missouri
Washington
Kentucky
Idaho
Oklahoma
Nebraska
NorthDakota
Wisconsin
SouthDakota
Kansas
WestVirginia
Utah
Montana
Oregon
Maine
Vermont
Wyoming
Hawaii
Alaska
None
1 in 2,000
1 in 1,000
1 in 667
1 in 500
1 6 11 16 21 26 31 36 41 46 51
Rank
TotalDeaths
Masks
No
Yes
Governor
aa
Democratic
Republican
Total US COVID-19 Deaths
p masks as of July 20, 2020: 0.029, p governor: 0.3. NB: association != causation.
2020-09-13 Summary: 24

25. Average US COVID-19 deaths over the past
7 days
Mississippi
Florida
SouthCarolina
Louisiana
Georgia
Tennessee
Arkansas
Texas
Nevada
NorthDakota
Idaho
NorthCarolina
Arizona
Missouri
Iowa
Montana
California
Alabama
Nebraska
Kansas
Kentucky
RhodeIsland
SouthDakota
Massachusetts
Ohio
Oklahoma
Illinois
Indiana
NewMexico
WestVirginia
Michigan
Hawaii
Minnesota
Wisconsin
Maryland
Pennsylvania
Delaware
Oregon
DistrictofColumbia
Virginia
Colorado
NewJersey
Alaska
Washington
Utah
Connecticut
NewHampshire
NewYork
Maine
Vermont
Wyoming
None
1 in 1,000,000
1 in 500,000
1 in 333,333
1 in 250,000
1 in 200,000
1 in 166,667
1 6 11 16 21 26 31 36 41 46 51
Rank
Deaths/Day
Masks
No
Yes
Governor
aa
Democratic
Republican
Average US COVID-19 deaths over the past 7 days
p masks as of July 20, 2020: 0.13, p governor: 0.029. NB: association != causation.
2020-09-13 Summary: 25

26. Daily testing trends
HI TX FL
OK LA MS AL GA
AZ NM KS AR TN NC SC DC
CA UT CO NE MO KY WV VA MD DE
OR NV WY SD IA IN OH PA NJ CT RI
WA ID MT ND MN IL MI NY MA
WI VT NH
AK ME
min
max
min
max
min
max
min
max
min
max
min
max
min
max
min
max
Dailytestingfrommintomax
Daily testing trends from min to max
Line = Friedman's supersmoother
2020-09-13 Summary: 26

27. Change in daily tests over past 14 days
Missouri
Maine
SouthDakota
Minnesota
Hawaii
SouthCarolina
Michigan
Illinois
Oklahoma
Wyoming
Connecticut
Massachusetts
Washington
RhodeIsland
Indiana
Arkansas
Delaware
Kentucky
NorthDakota
NorthCarolina
NewYork
Kansas
Ohio
Nebraska
Mississippi
Iowa
Montana
DistrictofColumbia
NewHampshire
Utah
Virginia
Oregon
Georgia
NewJersey
Pennsylvania
Texas
Tennessee
Maryland
Colorado
NewMexico
WestVirginia
California
Idaho
Alabama
Wisconsin
Florida
Arizona
Louisiana
Alaska
Nevada
Vermont
-4.0
-2.0
0.0
2.0
1 6 11 16 21 26 31 36 41 46 51
Rank
Changeindailytests(%/day)
Masks
No
Yes
Governor
aa
Democratic
Republican
Change in daily tests over past 14 days
p masks as of July 20, 2020: 0.7, p governor: 0.46. NB: association != causation.
2020-09-13 Summary: 27

28. Percent Tested
Alaska
NewYork
DistrictofColumbia
Louisiana
NewMexico
Connecticut
Illinois
Tennessee
NewJersey
California
Michigan
RhodeIsland
NorthDakota
Massachusetts
Arkansas
WestVirginia
Delaware
Montana
Oklahoma
NorthCarolina
Georgia
Maine
Vermont
Maryland
Wisconsin
Florida
Utah
Ohio
Minnesota
Iowa
Washington
Mississippi
Kentucky
Alabama
Nevada
Nebraska
Virginia
SouthCarolina
Texas
SouthDakota
Missouri
Indiana
Arizona
Hawaii
NewHampshire
Idaho
Kansas
Wyoming
Oregon
Pennsylvania
Colorado
0
20
40
60
1 6 11 16 21 26 31 36 41 46 51
Rank
PercentTested
Masks
No
Yes
Governor
aa
Democratic
Republican
Percent Tested
p masks as of July 20, 2020: 0.042, p governor: 0.19. NB: association != causation.
2020-09-13 Summary: 28

29. Percent of Positive COVID Tests
Arizona
Mississippi
Alabama
Florida
Idaho
SouthCarolina
Texas
Nevada
Georgia
Kansas
Iowa
SouthDakota
Nebraska
Missouri
Indiana
Arkansas
Utah
Maryland
Pennsylvania
Colorado
Louisiana
Virginia
RhodeIsland
Delaware
NorthCarolina
Tennessee
NorthDakota
Oklahoma
Wisconsin
Minnesota
Massachusetts
NewJersey
Kentucky
California
Illinois
Ohio
Wyoming
Washington
NewYork
Oregon
DistrictofColumbia
Hawaii
Connecticut
Michigan
NewHampshire
NewMexico
Montana
WestVirginia
Alaska
Maine
Vermont
0.0
5.0
10.0
15.0
1 6 11 16 21 26 31 36 41 46 51
Rank
PercentofPositiveTests
Masks
No
Yes
Governor
aa
Democratic
Republican
Percent of Positive COVID Tests
p masks as of July 20, 2020: 0.017, p governor: 0.003. NB: association != causation.
2020-09-13 Summary: 29

30. Positive fraction trends
HI TX FL
OK LA MS AL GA
AZ NM KS AR TN NC SC DC
CA UT CO NE MO KY WV VA MD DE
OR NV WY SD IA IN OH PA NJ CT RI
WA ID MT ND MN IL MI NY MA
WI VT NH
AK ME
min
max
min
max
min
max
min
max
min
max
min
max
min
max
min
max
Fractionpositivefrommintomax
Positive fraction trends from min to max
2020-09-13 Summary: 30

31. Change in positive tests over past 14 days
NorthDakota
WestVirginia
SouthDakota
Montana
Wisconsin
Missouri
Kansas
Kentucky
Alabama
Oklahoma
Alaska
Iowa
Minnesota
Idaho
Utah
Arkansas
Nebraska
Florida
Tennessee
Virginia
Oregon
Indiana
Nevada
Mississippi
Pennsylvania
Hawaii
Maryland
SouthCarolina
Georgia
Delaware
NewMexico
Wyoming
Louisiana
Colorado
Michigan
Ohio
Texas
NewHampshire
NorthCarolina
California
Arizona
Washington
Illinois
RhodeIsland
Vermont
DistrictofColumbia
NewJersey
NewYork
Connecticut
Massachusetts
Maine
-1.00
-0.50
0.00
0.50
1.00
1.50
1 6 11 16 21 26 31 36 41 46 51
Rank
Changeinpositivetests(%/day)
Masks
No
Yes
Governor
aa
Democratic
Republican
Change in positive tests over past 14 days
p masks as of July 20, 2020: 0.0076, p governor: 0.019. NB: association != causation.
2020-09-13 Summary: 31

32. Change in tests vs change in positive tests
ALAK
AZ
AR
CA
CO
CT
DE
DC
FL
GA
HI
ID
IL
IN
IA
KS
KY
LA
ME
MD
MA
MI
MN
MS
MO
MT
NE
NV
NH
NJ
NM
NY
NC
ND
OH
OK
OR
PA
RI
SC
SD
TN
TX
UT
VT
VA
WA
WV
WI
WY
-1.0
-0.5
0.0
0.5
1.0
1.5
-4 -2 0 2
Change in tests (%/day)
Changeinpositivetests(%/day)
Change in tests vs change in positive tests last 14 days as of 2020-09-13
Size of the state font reflects the number of deaths over the past 7 days.
2020-09-13 Summary: 32

33. Current hospitalizations as a percent of peak
since FebruaryMissouri
Montana
WestVirginia
NorthDakota
SouthDakota
Alaska
Nebraska
Kansas
Hawaii
Kentucky
Oklahoma
Iowa
Wyoming
Arkansas
NorthCarolina
Idaho
Tennessee
Virginia
Georgia
Utah
Ohio
Oregon
Indiana
Mississippi
Wisconsin
Alabama
Washington
SouthCarolina
California
Minnesota
Nevada
Louisiana
NewMexico
Texas
Illinois
Florida
RhodeIsland
Colorado
DistrictofColumbia
Maryland
Delaware
Maine
Michigan
Pennsylvania
Arizona
Massachusetts
Vermont
NewHampshire
NewJersey
Connecticut
NewYork
0
30
60
90
1 6 11 16 21 26 31 36 41 46 51
Rank
Hospitalizations(%ofpeak)
Masks
No
Yes
Governor
aa
Democratic
Republican
Current hospitalizations as a percent of peak since February
p masks as of July 20, 2020: 0.0091, p governor: 0.048. NB: association != causation.
2020-09-13 Summary: 33

34. Hospitalizations trends
HI TX FL
OK LA MS AL GA
AZ NM KS AR TN NC SC DC
CA UT CO NE MO KY WV VA MD DE
OR NV WY SD IA IN OH PA NJ CT RI
WA ID MT ND MN IL MI NY MA
WI VT NH
AK ME
min
max
min
max
min
max
min
max
min
max
min
max
min
max
min
max
Hospitalizationsfrommintomax
Hospitalizations trends from min to max
2020-09-13 Summary: 34

35. Change in hospitalizations over past 14
days
DistrictofColumbia
SouthDakota
Montana
Maine
Utah
Delaware
Nebraska
NewMexico
Oregon
Kansas
WestVirginia
Missouri
NewYork
Massachusetts
Wisconsin
RhodeIsland
Iowa
NorthDakota
Illinois
Alaska
Kentucky
Michigan
Tennessee
NewJersey
Virginia
Pennsylvania
Oklahoma
Connecticut
Arkansas
NorthCarolina
Hawaii
Indiana
Georgia
Idaho
Colorado
Maryland
Ohio
Minnesota
NewHampshire
Wyoming
SouthCarolina
Washington
Texas
Louisiana
Alabama
California
Mississippi
Nevada
Arizona
Florida
Vermont
-9.0
-6.0
-3.0
0.0
1 6 11 16 21 26 31 36 41 46 51
Rank
Changeinhospitalizations(%/day)
Masks
No
Yes
Governor
aa
Democratic
Republican
Change in hospitalizations over past 14 days
p masks as of July 20, 2020: 0.49, p governor: 0.16. NB: association != causation.
2020-09-13 Summary: 35

36. CV for Cases and Deaths
NCMD
IL PAIN WICO SC CA
IAGANM
OR MAKYOK MN ARFL TXID MSTN MI NVLA NDAZALUT RIVA MT DC WVMOWA SDNY KS
HINJAK CTNEOH
DE
ME NH
WY
0.010.01
0.10
1.00
0.010.01 0.10 1.00
Cases CV
DeathsCV
Coefficient of variation for cases and deaths as of 2020-09-13
CV calculated over last 28 days
2020-09-13 Summary: 36

37. Change in New Cases per Day
Direction
Increasing > +2%
Increasing between +0.5% and +2%
No Change (-0.5% to +0.5%)
Decreasing between -0.5% and -2%
Decreasing > -2%
NA
Trends by county as of 2020-09-13
NA = Inadequate data
2020-09-13 Summary: 37