TABLE 4.
Exposure Testing and Positivity Risk Stratified by Time of Collection
| All (7/1/2021–5/1/2022) | Δ (7/1/2021–12/18/2021) | ο (12/19/2021–5/1/2022) | ||||
|---|---|---|---|---|---|---|
| Site | Total Tests | Total Positivea, n (%) | Total Tests | Total Positiveb, n (%) | Total Tests | Total Positivec, n (%) |
| Children's Mercy and ICF | 73 | 3 (4.1) | 48 | 1 (2.1) | 25 | 2 (8) |
| Duke University | 10 568 | 394 (3.7) | 3853 | 93 (2.4) | 6715 | 301 (4.5) |
| San Diego State University | 380 | 14 (3.7) | 79 | 0 (0) | 301 | 14 (4.7) |
| University of Miami | 169 | 7 (4.1) | 138 | 1 (0.7) | 31 | 6 (19.4) |
| University of Rochester | 78 | 3 (3.8) | 38 | 1 (2.6) | 40 | 2 (5) |
| Washington University School of Medicine | 1676 | 102 (6.1) | 1355 | 59 (4.4) | 321 | 43 (13.4) |
| Washington University School of Medicine in St. Louis and Special School District of St Louis county | 73 | 2 (2.7) | 11 | 0 (0) | 62 | 2 (3.2) |
| All sites | 13 017 | 525 (4) | 5522 | 155 (2.8) | 7495 | 370 (4.9) |
ICF, The Inner City Fund.
a
Percentages are calculated based on the total number of participants tested during the survey time period.
b
Percentages are calculated based on the total number of participants tested during the δ variant time period.
c
Percentages are calculated based on the total number of participants tested during the ο variant time period.