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Table 2 Accumulated numbers of corrected and reported infections in Chicago from 01-Mar-2020 to 23-Dec-2020. Corrections use the median values and the 90% CI values from Table 1

From: COVID-19 underreporting and its impact on vaccination strategies

Period

By hopitalization rate

By death rate

Observed

Citywide correction

 01-Mar to 31-July

169,126 (149,945–222,446)

290,123 (186,707–423,991)

61,905

 01-Aug to 05-Oct

21,772 (21,157–27,321)

22,607 (21,134–30,861)

20,790

 06-Oct to 23-Dec

113,992 (113,992–113,994)

127,476 (115,017–167,933)

113,693

 01-Mar to 23-Dec

304,890 (285,095–363,762)

440,207 (322,859–622,785)

196,388

Correction by gender

 01-Mar to 31-July

170,244 (143,304–223,130)

297,418 (197,599–453,493)

61,905

 01-Aug to 05-Oct

21,994 (21,049–27,231)

23,616 (21,085–33,237)

20,790

 06-Oct to 23-Dec

113,561 (113,561–113,712)

129,178 (115,451–178,659)

113,693

 01-Mar to 23-Dec

305,798 (277,914–364,073)

450,212 (334,135–665,389)

196,388

Correction by age range

 01-Mar to 31-July

141,280 (97,351–254,365)

168,202 (80,124–264,252)

61,905

 01-Aug to 05-Oct

23,998 (21,209–40,851)

25,180 (21,146–31,802)

20,790

 06-Oct to 23-Dec

114,188 (113,979–132,578)

118,656 (113,986–146,240)

113,693

 01-Mar to 23-Dec

279,466 (232,539–427,795)

312,038 (215,257–442,295)

196,388