Table 2.
Summary of outbreaks and cases in preschools and schools reported or notified to the NCTT
| Preschools | Primary | Combineda | Lower secondary | Upper secondary | Total | |
|---|---|---|---|---|---|---|
| Outbreaks (n (%)) | 298 (25) | 457 (40) | 33 (3) | 190 (16) | 225 (19) | 1203 |
| Pupils only | 58 (10) | 230 (40) | 18 (3) | 125 (22) | 143 (25) | 574 |
| Staff only | 51 (71) | 13 (18) | 0 (0) | 1 (1) | 7 (10) | 72 |
| ≥ 20 cases | 8 (20) | 17 (43) | 2 (5) | 5 (13) | 8 (20) | 40 |
| Cases (n (%)) | 1447 (22) | 2446 (37) | 255 (4) | 1018 (16) | 1376 (21) | 6530 |
| Pupils/children | 799 (16) | 1917 (38) | 214 (4) | 894 (18) | 1208 (24) | 5032 |
| Staff members | 648 (43) | 528 (35) | 41 (3) | 124 (8) | 157 (10) | 1498 |
| Infected staff per infected pupils/children | 0.8 | 0.3 | 0.2 | 0.1 | 0.1 | 3.4 |
| Mean (SDb), per outbreak | 4.9 (4.5) | 5.4 (5.6) | 7.7 (7.6) | 5.4 (5.8) | 6.1 (8.2) | 5.4 (6.0) |
| Median (IQRc), per outbreak | 3 (2–5) | 3 (2–6) | 4 (3–10.5) | 3 (2–6) | 4 (2–7) | 3 (2–6) |
| Range | 2–30 | 2–52 | 2–34 | 2–55 | 2–72 | 2–72 |
aCombined primary and lower secondary schools
bStandard deviation
cInterquartile range