Table 2 Descriptive statistics of outbreak characteristics by setting type, January 1 to December 31, 2021
Setting | Outbreaks | Outbreak cases | Outbreak size (cases/ outbreak) | Outbreak duration (days) | Outbreak intensity (cases/day) | Number of people at risk (people) | Median age of outbreak cases (years) | Proportion of population at risk with at least 1 dose (%) |
|---|---|---|---|---|---|---|---|---|
Number (%) | Mean (95% CI) | |||||||
Acute care | 842 (4.4) | 8,945 (5.2) | 10.6 (9.9,11.3) | 15.2 (14.3, 16.1) | 0.91 (0.85, 0.96) | 118 (98.8, 138.1) | 58.8 (57.5, 60.0) | 43.4 (40.5, 46.2) |
Childcare | 2,731 (14.4) | 14,779 (8.6) | 5.4 (5.2, 5.6) | 9.0 (8.7, 9.3) | 0.84 (0.81, 0.87) | 63 (60.5, 64.7) | 10.6 (10.1, 11.0) | 8.8 (7.8, 9.7) |
Correctional facility | 117 (0.6) | 3,467 (2.0) | 29.6 (22.6, 36.7) | 20.6 (17.7, 23.5) | 1.47 (1.19, 1.75) | 148 (129.5, 167.0) | 36.4 (35.1, 37.7) | 38.1 (31.2, 45.0) |
Industrial/ agricultural | 4,929 (25.9) | 34,302 (20.1) | 7.0 (6.6, 7.3) | 10.6 (10.3, 11.0) | 0.81 (0.79, 0.83) | 149 (141.9, 156.3) | 41.3 (41.0, 41.6) | 27.6 (26.7, 28.6) |
Long-term care facility | 1,120 (5.9) | 30,584 (17.9) | 27.3 (25.2, 29.4) | 25.4 (24.0, 26.8) | 1.09 (1.01, 1.17) | 234 (223.6, 244.5) | 57.8 (56.8, 58.8) | 54.8 (52.3, 57.2) |
School | 7,125 (37.5) | 50,230 (29.4) | 7.1 (6.8, 7.3) | 12.7 (12.3, 13.0) | 0.77 (0.76, 0.79) | 383 (375.4, 390.6) | 12.2 (12.0, 12.4) | 8.2 (7.7, 8.8) |
Retirement residence/ assisted living | 1,695 (8.9) | 24,287 (14.2) | 14.3 (13.4, 15.2) | 19.0 (18.1, 19.8) | 0.93 (0.87, 1.00) | 109 (104.5, 113.5) | 58.6 (57.6, 59.6) | 50.8 (48.9, 52.8) |
Other congregate living | 446 (2.3) | 4,452 (2.6) | 10.0 (8.8, 11.2) | 16.7 (14.9, 18.4) | 0.76 (0.70, 0.83) | 87 (79.4, 93.8) | 39.6 (38.3, 41.0) | 40.9 (37.2, 44.7) |
Overall | 19,005 | 171,046 | 9.0 (8.8, 9.2) | 13.2 (13.0, 13.4) | 0.84 (0.82, 0.85) | 223 (218.9, 227.0) | 29.2 (28.9, 29.5) | 22.4 (21.9, 22.9) |