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The COVID Tracking Project will stop collecting data on March 7, 2021.

Definitions

Antibody Tests History

DateTotal antibody tests (people)Total antibody tests (specimens)Negative antibody tests (people)Negative antibody tests (specimens)Positive antibody tests (people)Positive antibody tests (specimens)
February 25, 2021N/A131,183N/A104,552N/A26,631
February 24, 2021N/A130,819N/A104,336N/A26,483
February 23, 2021N/A130,034N/A103,882N/A26,152
February 22, 2021N/A130,034N/A103,882N/A26,152
February 21, 2021N/A130,032N/A103,880N/A26,152
February 20, 2021N/A129,546N/A103,595N/A25,951
February 19, 2021N/A129,076N/A103,366N/A25,710
February 18, 2021N/A128,630N/A103,119N/A25,511
February 17, 2021N/A128,369N/A102,961N/A25,408
February 16, 2021N/A128,136N/A102,844N/A25,292
February 15, 2021N/A127,990N/A102,747N/A25,243
February 14, 2021N/A127,604N/A102,532N/A25,072
February 13, 2021N/A126,952N/A102,162N/A24,790
February 12, 2021N/A126,351N/A101,856N/A24,495
February 11, 2021N/A125,783N/A101,550N/A24,233
February 10, 2021N/A125,476N/A101,380N/A24,096
February 9, 2021N/A125,354N/A101,339N/A24,015
February 8, 2021N/A124,962N/A101,118N/A23,844
February 7, 2021N/A124,446N/A100,845N/A23,601
February 6, 2021N/A123,901N/A100,546N/A23,355
February 5, 2021N/A123,221N/A100,189N/A23,032
February 4, 2021N/A122,593N/A99,849N/A22,744
February 3, 2021N/A122,342N/A99,705N/A22,637
February 2, 2021N/A122,181N/A99,617N/A22,564
February 1, 2021N/A121,817N/A99,396N/A22,421
January 31, 2021N/A121,206N/A99,070N/A22,136
January 30, 2021N/A120,588N/A98,683N/A21,905
January 29, 2021N/A119,807N/A98,196N/A21,611
January 28, 2021N/A119,217N/A97,856N/A21,361
January 27, 2021N/A118,893N/A97,657N/A21,236
January 26, 2021N/A118,745N/A97,566N/A21,179
January 25, 2021N/A118,295N/A97,328N/A20,967
January 24, 2021N/A117,682N/A96,952N/A20,730
January 23, 2021N/A117,085N/A96,565N/A20,520
January 22, 2021N/A116,369N/A96,181N/A20,188
January 21, 2021N/A115,836N/A95,874N/A19,962
January 20, 2021N/A115,470N/A95,655N/A19,815
January 19, 2021N/A115,262N/A95,520N/A19,742
January 18, 2021N/A114,933N/A95,312N/A19,621
January 17, 2021N/A114,358N/A94,963N/A19,395
January 16, 2021N/A113,084N/A94,100N/A18,984
January 15, 2021N/A112,275N/A93,597N/A18,678
January 14, 2021N/A111,799N/A93,277N/A18,522
January 13, 2021N/A111,059N/A92,790N/A18,269
January 12, 2021N/A110,469N/A92,400N/A18,069
January 11, 2021N/A110,430N/A92,372N/A18,058
January 10, 2021N/A109,820N/A91,989N/A17,831
January 9, 2021N/A109,635N/A91,859N/A17,776
January 8, 2021N/A108,847N/A91,357N/A17,490
January 7, 2021N/A107,963N/A90,700N/A17,263
January 6, 2021N/A107,656N/A90,487N/A17,169
January 5, 2021N/A107,397N/A90,335N/A17,062
January 4, 2021N/A107,242N/A90,229N/A17,013
January 3, 2021N/A106,971N/A90,059N/A16,912
January 2, 2021N/A105,968N/A89,362N/A16,606
January 1, 2021N/A105,425N/A88,978N/A16,447
December 31, 2020N/A105,425N/A88,978N/A16,447
December 30, 2020N/A105,015N/A88,648N/A16,367
December 29, 2020N/A104,832N/A88,512N/A16,320
December 28, 2020N/A104,654N/A88,408N/A16,246
December 27, 2020N/A104,488N/A88,282N/A16,206
December 26, 2020N/A103,329N/A87,474N/A15,855
December 25, 2020N/A102,762N/A87,064N/A15,698
December 24, 2020N/A102,762N/A87,064N/A15,698
December 23, 2020N/A102,455N/A86,869N/A15,586
December 22, 2020N/A101,914N/A86,478N/A15,436
December 21, 2020N/A101,405N/A86,086N/A15,319
December 20, 2020N/A100,664N/A85,535N/A15,129
December 19, 2020N/A100,382N/A85,354N/A15,028
December 18, 2020N/A98,874N/A84,768N/A14,106
December 17, 2020N/A98,079N/A84,169N/A13,910
December 16, 2020N/A97,715N/A83,898N/A13,817
December 15, 2020N/A97,390N/A83,628N/A13,762
December 14, 2020N/A97,021N/A83,366N/A13,655
December 13, 2020N/A96,303N/A82,854N/A13,449
December 12, 2020N/A94,663N/A81,693N/A12,970
December 11, 2020N/A94,663N/A81,693N/A12,970
December 10, 2020N/A93,980N/A81,200N/A12,780
December 9, 2020N/A93,470N/A80,819N/A12,651
December 8, 2020N/A93,235N/A80,649N/A12,586
December 7, 2020N/A92,912N/A80,410N/A12,502
December 6, 2020N/A92,607N/A80,199N/A12,408
December 5, 2020N/A92,060N/A79,812N/A12,248
December 4, 2020N/A91,560N/A79,476N/A12,084
December 3, 2020N/A91,078N/A79,104N/A11,974
December 2, 2020N/A90,903N/A79,007N/A11,896
December 1, 2020N/A90,777N/A78,915N/A11,862
November 30, 2020N/A90,712N/A78,861N/A11,851
November 29, 2020N/A90,602N/A78,771N/A11,831
November 28, 2020N/A90,320N/A78,542N/A11,778
November 27, 2020N/A89,768N/A78,143N/A11,625
November 26, 2020N/A88,847N/A77,529N/A11,318
November 25, 2020N/A88,847N/A77,529N/A11,318
November 24, 2020N/A88,574N/A77,361N/A11,213
November 23, 2020N/A88,315N/A77,189N/A11,126
November 22, 2020N/A87,849N/A76,867N/A10,982
November 21, 2020N/A87,397N/A76,564N/A10,833
November 20, 2020N/A86,641N/A76,067N/A10,574
November 19, 2020N/A86,043N/A75,667N/A10,376
November 18, 2020N/A85,520N/A75,309N/A10,211
November 17, 2020N/A85,280N/A75,134N/A10,146
November 16, 2020N/A85,117N/A74,992N/A10,125
November 15, 2020N/A84,864N/A74,800N/A10,064
November 14, 2020N/A84,602N/A74,614N/A9,988
November 13, 2020N/A83,998N/A74,215N/A9,783
November 12, 2020N/A83,776N/A74,045N/A9,731
November 11, 2020N/A83,479N/A73,829N/A9,650
November 10, 2020N/A83,290N/A73,707N/A9,523
November 9, 2020N/A82,981N/A73,458N/A9,523
November 8, 2020N/A82,939N/A73,421N/A9,518
November 7, 2020N/A82,469N/A73,044N/A9,425
November 6, 2020N/A81,845N/A72,567N/A9,278
November 5, 2020N/A81,413N/A72,237N/A9,176
November 4, 2020N/A81,313N/A72,151N/A9,162
November 3, 2020N/A81,159N/A72,029N/A9,130
November 2, 2020N/A80,951N/A71,844N/A9,107
November 1, 2020N/A80,795N/A71,712N/A9,083
October 31, 2020N/A80,268N/A71,287N/A8,981
October 30, 2020N/A79,922N/A71,021N/A8,901
October 29, 2020N/A79,760N/A70,886N/A8,874
October 28, 2020N/A79,365N/A70,568N/A8,797
October 27, 2020N/A78,989N/A70,328N/A8,661
October 26, 2020N/A78,887N/A70,263N/A8,624
October 25, 2020N/A78,666N/A70,079N/A8,587
October 24, 2020N/A78,209N/A69,729N/A8,480
October 23, 2020N/A77,863N/A69,440N/A8,423
October 22, 2020N/A77,622N/A69,308N/A8,314
October 21, 2020N/A77,263N/A69,038N/A8,225
October 20, 2020N/A77,037N/A68,860N/A8,177
October 19, 2020N/A76,822N/A68,662N/A8,160
October 18, 2020N/A76,629N/A68,524N/A8,105
October 17, 2020N/A76,398N/A68,341N/A8,057
October 16, 2020N/A75,938N/A68,013N/A7,925
October 15, 2020N/A75,509N/A67,652N/A7,857
October 14, 2020N/A75,157N/A67,368N/A7,789
October 13, 2020N/A74,928N/A67,194N/A7,734
October 12, 2020N/A74,809N/A67,086N/A7,723
October 11, 2020N/A74,645N/A66,950N/A7,695
October 10, 2020N/A74,342N/A66,711N/A7,631
October 9, 2020N/A73,971N/A66,398N/A7,573
October 8, 2020N/A73,614N/A66,116N/A7,498
October 7, 2020N/A73,100N/A65,678N/A7,422
October 6, 2020N/A72,893N/A65,534N/A7,359
October 5, 2020N/A72,652N/A65,332N/A7,320
October 4, 2020N/A72,475N/A65,190N/A7,285
October 3, 2020N/A71,528N/A64,463N/A7,065
October 2, 2020N/A71,528N/A64,463N/A7,065
October 1, 2020N/A71,256N/A64,278N/A6,978
September 30, 2020N/A71,177N/A64,219N/A6,958
September 29, 2020N/A71,059N/A64,145N/A6,914
September 28, 2020N/A70,816N/A63,925N/A6,891
September 27, 2020N/A70,686N/A63,810N/A6,876
September 26, 2020N/A70,491N/A63,660N/A6,831
September 25, 2020N/A70,135N/A63,469N/A6,666
September 24, 2020N/A69,862N/A63,259N/A6,603
September 23, 2020N/A69,484N/A63,014N/A6,470
September 22, 2020N/A68,926N/A62,577N/A6,349
September 21, 2020N/A68,266N/A61,961N/A6,305
September 20, 2020N/A68,049N/A61,795N/A6,254
September 19, 2020N/A67,865N/A61,633N/A6,232
September 18, 2020N/A67,459N/A61,306N/A6,153
September 17, 2020N/A66,921N/A60,901N/A6,020
September 16, 2020N/A66,765N/A60,764N/A6,001
September 15, 2020N/A66,624N/A60,657N/A5,967
September 14, 2020N/A66,581N/A60,621N/A5,960
September 13, 2020N/A66,426N/A60,519N/A5,907
September 12, 2020N/A65,834N/A60,035N/A5,799
September 11, 2020N/A65,478N/A59,741N/A5,737
September 10, 2020N/A65,181N/A59,501N/A5,680
September 9, 2020N/A65,054N/A59,407N/A5,647
September 8, 2020N/A64,981N/A59,336N/A5,645
September 7, 2020N/A64,929N/A59,288N/A5,641
September 6, 2020N/A64,756N/A59,138N/A5,618
September 5, 2020N/A64,470N/A58,908N/A5,562
September 4, 2020N/A64,094N/A58,616N/A5,478
September 3, 2020N/A63,761N/A58,135N/A5,313
September 2, 2020N/A63,448N/A58,135N/A5,313
September 1, 2020N/A63,331N/A58,050N/A5,281
August 31, 2020N/A63,256N/A57,989N/A5,267
August 30, 2020N/A63,017N/A57,790N/A5,227
August 29, 2020N/A62,717N/A57,544N/A5,173
August 28, 2020N/A62,412N/A57,308N/A5,104
August 27, 2020N/A62,032N/A57,006N/A5,026
August 26, 2020N/A61,651N/A56,702N/A4,949
August 25, 2020N/A61,524N/A56,604N/A4,920
August 24, 2020N/A61,338N/A56,477N/A4,861
August 23, 2020N/A61,190N/A56,344N/A4,846
August 22, 2020N/A62,733N/A57,763N/A4,970
August 21, 2020N/A62,372N/A57,478N/A4,894
August 20, 2020N/A61,932N/A57,120N/A4,812
August 19, 2020N/A61,557N/A56,762N/A4,795
August 18, 2020N/A61,311N/A56,573N/A4,738
August 17, 2020N/A61,227N/A56,505N/A4,722
August 16, 2020N/A61,005N/A56,305N/A4,700
August 15, 2020N/A60,532N/A55,892N/A4,640
August 14, 2020N/A59,917N/A55,364N/A4,553
August 13, 2020N/A56,730N/A52,562N/A4,168
August 12, 2020N/A56,309N/A52,236N/A4,073
August 11, 2020N/A56,148N/A52,099N/A4,049
August 10, 2020N/A56,070N/A52,035N/A4,035
August 9, 2020N/A55,882N/A51,871N/A4,011
August 8, 2020N/A55,713N/A51,720N/A3,993
August 7, 2020N/A55,182N/A51,277N/A3,905
August 6, 2020N/A54,487N/A50,726N/A3,761
August 5, 2020N/A54,232N/A50,496N/A3,736
August 4, 2020N/A54,061N/A50,378N/A3,683
August 3, 2020N/A53,960N/A50,289N/A3,671
August 2, 2020N/A53,637N/A50,002N/A3,635
August 1, 2020N/A53,233N/A49,676N/A3,557
July 31, 2020N/A52,407N/A48,977N/A3,430
July 30, 2020N/A52,407N/A48,977N/A3,430
July 29, 2020N/A51,771N/A48,452N/A3,319
July 28, 2020N/A51,503N/A48,268N/A3,235
July 27, 2020N/A51,401N/A48,187N/A3,214
July 26, 2020N/A51,222N/A48,039N/A3,183
July 25, 2020N/A50,741N/A47,636N/A3,105
July 24, 2020N/A50,168N/A47,120N/A3,048
July 23, 2020N/A49,577N/A46,637N/A2,940
July 22, 2020N/A49,007N/A46,124N/A2,883
July 21, 2020N/A48,590N/A45,784N/A2,806
July 20, 2020N/A48,510N/A45,729N/A2,781
July 19, 2020N/A48,226N/A45,462N/A2,764
July 18, 2020N/A47,084N/A44,686N/A2,398
July 17, 2020N/A46,882N/A44,524N/A2,358
July 16, 2020N/A46,263N/A43,957N/A2,306
July 15, 2020N/A45,295N/A43,149N/A2,146
July 14, 2020N/A45,101N/A42,970N/A2,131
July 13, 2020N/A45,067N/A42,940N/A2,127
July 12, 2020N/A44,173N/A42,087N/A2,086
July 11, 2020N/A44,312N/A42,257N/A2,055
July 10, 2020N/A43,614N/A41,576N/A2,038
July 9, 2020N/A42,786N/A40,782N/A2,004
July 8, 2020N/A41,967N/A39,977N/A1,990
July 7, 2020N/A41,635N/A39,706N/A1,929
July 6, 2020N/A41,571N/A39,648N/A1,923
July 5, 2020N/A41,450N/A39,531N/A1,919
July 4, 2020N/A41,221N/A39,313N/A1,908
July 3, 2020N/A40,152N/A38,296N/A1,856
July 2, 2020N/A39,570N/A37,723N/A1,847
July 1, 2020N/A38,532N/A36,717N/A1,815
June 30, 2020N/A38,020N/A36,224N/A1,796
June 29, 2020N/A37,654N/A35,882N/A1,772
June 28, 2020N/A37,397N/A35,645N/A1,752
June 27, 2020N/A36,533N/A34,799N/A1,734
June 26, 2020N/A35,242N/A33,536N/A1,706
June 25, 2020N/A35,242N/A33,536N/A1,706
June 24, 2020N/A34,242N/A32,561N/A1,681
June 23, 2020N/A33,975N/A32,313N/A1,662
June 22, 2020N/A33,906N/A32,276N/A1,630
June 21, 2020N/A33,506N/A31,883N/A1,623
June 20, 2020N/A32,877N/A31,275N/A1,602
June 19, 2020N/A32,092N/A30,523N/A1,569
June 18, 2020N/A31,376N/A29,838N/A1,538
June 17, 2020N/A30,378N/A28,878N/A1,500
June 16, 2020N/A30,056N/A28,573N/A1,483
June 15, 2020N/A29,981N/A28,524N/A1,457
June 14, 2020N/A29,708N/A28,264N/A1,444
June 13, 2020N/A29,023N/A27,599N/A1,424
June 12, 2020N/A28,298N/A26,913N/A1,385
June 11, 2020N/A27,609N/A26,272N/A1,337
June 10, 2020N/AN/AN/AN/AN/AN/A
June 9, 2020N/AN/AN/AN/AN/AN/A
June 8, 2020N/AN/AN/AN/AN/AN/A
June 7, 2020N/AN/AN/AN/AN/AN/A
June 6, 2020N/AN/AN/AN/AN/AN/A
June 5, 2020N/AN/AN/AN/AN/AN/A
June 4, 2020N/AN/AN/AN/AN/AN/A
June 3, 2020N/AN/AN/AN/AN/AN/A
June 2, 2020N/AN/AN/AN/AN/AN/A
June 1, 2020N/AN/AN/AN/AN/AN/A
May 31, 2020N/AN/AN/AN/AN/AN/A
May 30, 2020N/AN/AN/AN/AN/AN/A
May 29, 2020N/AN/AN/AN/AN/AN/A
May 28, 2020N/AN/AN/AN/AN/AN/A
May 27, 2020N/AN/AN/AN/AN/AN/A
May 26, 2020N/AN/AN/AN/AN/AN/A
May 25, 2020N/AN/AN/AN/AN/AN/A
May 24, 2020N/AN/AN/AN/AN/AN/A
May 23, 2020N/AN/AN/AN/AN/AN/A
May 22, 2020N/AN/AN/AN/AN/AN/A
May 21, 2020N/AN/AN/AN/AN/AN/A
May 20, 2020N/AN/AN/AN/AN/AN/A
May 19, 2020N/AN/AN/AN/AN/AN/A
May 18, 2020N/AN/AN/AN/AN/AN/A
May 17, 2020N/AN/AN/AN/AN/AN/A
May 16, 2020N/AN/AN/AN/AN/AN/A
May 15, 2020N/AN/AN/AN/AN/AN/A
May 14, 2020N/AN/AN/AN/AN/AN/A
May 13, 2020N/AN/AN/AN/AN/AN/A
May 12, 2020N/AN/AN/AN/AN/AN/A
May 11, 2020N/AN/AN/AN/AN/AN/A
May 10, 2020N/AN/AN/AN/AN/AN/A
May 9, 2020N/AN/AN/AN/AN/AN/A
May 8, 2020N/AN/AN/AN/AN/AN/A
May 7, 2020N/AN/AN/AN/AN/AN/A
May 6, 2020N/AN/AN/AN/AN/AN/A
May 5, 2020N/AN/AN/AN/AN/AN/A
May 4, 2020N/AN/AN/AN/AN/AN/A
May 3, 2020N/AN/AN/AN/AN/AN/A
May 2, 2020N/AN/AN/AN/AN/AN/A
May 1, 2020N/AN/AN/AN/AN/AN/A
April 30, 2020N/AN/AN/AN/AN/AN/A
April 29, 2020N/AN/AN/AN/AN/AN/A
April 28, 2020N/AN/AN/AN/AN/AN/A
April 27, 2020N/AN/AN/AN/AN/AN/A
April 26, 2020N/AN/AN/AN/AN/AN/A
April 25, 2020N/AN/AN/AN/AN/AN/A
April 24, 2020N/AN/AN/AN/AN/AN/A
April 23, 2020N/AN/AN/AN/AN/AN/A
April 22, 2020N/AN/AN/AN/AN/AN/A
April 21, 2020N/AN/AN/AN/AN/AN/A
April 20, 2020N/AN/AN/AN/AN/AN/A
April 19, 2020N/AN/AN/AN/AN/AN/A
April 18, 2020N/AN/AN/AN/AN/AN/A
April 17, 2020N/AN/AN/AN/AN/AN/A
April 16, 2020N/AN/AN/AN/AN/AN/A
April 15, 2020N/AN/AN/AN/AN/AN/A
April 14, 2020N/AN/AN/AN/AN/AN/A
April 13, 2020N/AN/AN/AN/AN/AN/A
April 12, 2020N/AN/AN/AN/AN/AN/A
April 11, 2020N/AN/AN/AN/AN/AN/A
April 10, 2020N/AN/AN/AN/AN/AN/A
April 9, 2020N/AN/AN/AN/AN/AN/A
April 8, 2020N/AN/AN/AN/AN/AN/A
April 7, 2020N/AN/AN/AN/AN/AN/A
April 6, 2020N/AN/AN/AN/AN/AN/A
April 5, 2020N/AN/AN/AN/AN/AN/A
April 4, 2020N/AN/AN/AN/AN/AN/A
April 3, 2020N/AN/AN/AN/AN/AN/A
April 2, 2020N/AN/AN/AN/AN/AN/A
April 1, 2020N/AN/AN/AN/AN/AN/A
March 31, 2020N/AN/AN/AN/AN/AN/A
March 30, 2020N/AN/AN/AN/AN/AN/A
March 29, 2020N/AN/AN/AN/AN/AN/A
March 28, 2020N/AN/AN/AN/AN/AN/A
March 27, 2020N/AN/AN/AN/AN/AN/A
March 26, 2020N/AN/AN/AN/AN/AN/A
March 25, 2020N/AN/AN/AN/AN/AN/A
March 24, 2020N/AN/AN/AN/AN/AN/A
March 23, 2020N/AN/AN/AN/AN/AN/A
March 22, 2020N/AN/AN/AN/AN/AN/A
March 21, 2020N/AN/AN/AN/AN/AN/A
March 20, 2020N/AN/AN/AN/AN/AN/A
March 19, 2020N/AN/AN/AN/AN/AN/A
March 18, 2020N/AN/AN/AN/AN/AN/A
March 17, 2020N/AN/AN/AN/AN/AN/A
March 16, 2020N/AN/AN/AN/AN/AN/A
March 15, 2020N/AN/AN/AN/AN/AN/A
March 14, 2020N/AN/AN/AN/AN/AN/A
March 13, 2020N/AN/AN/AN/AN/AN/A
March 12, 2020N/AN/AN/AN/AN/AN/A
March 11, 2020N/AN/AN/AN/AN/AN/A
March 10, 2020N/AN/AN/AN/AN/AN/A
March 9, 2020N/AN/AN/AN/AN/AN/A
March 8, 2020N/AN/AN/AN/AN/AN/A
March 7, 2020N/AN/AN/AN/AN/AN/A
March 6, 2020N/AN/AN/AN/AN/AN/A
March 5, 2020N/AN/AN/AN/AN/AN/A
March 4, 2020N/AN/AN/AN/AN/AN/A