Table 2.
SARS‐CoV‐2 secondary transmission in the school setting
| Study | School types | SARS‐CoV‐2 index cases (age) | Contacts tested n (%) | Secondary infections | SAR | |
|---|---|---|---|---|---|---|
| Yoon et al. 39 (South Korea) | 5 kindergartens | 5 students | 670 | 0 | 0 | |
| 15 elementary schools | 19 students | 2453 | 1 | 0.04% | ||
| 8 middle schools | 8 students | 1962 | 0 | 0 | ||
| 12 high schools | 13 students | 4747 | 0 | 0 | ||
| Yung et al. 45 (Singapore) | Preschool A | 1 student (5) | 34 | 0 | 0 | |
| Preschool B | 1 adult staff | 77 (73) | 16 staff 0 students | 0 | ||
| Secondary school | 1 student (12) | 8 | 0 | 0 | ||
| Danis et al. 46 (French Alps) | 3 schools |
1 student (9) (visited all 3 schools while symptomatic) |
55 (64) | 0 | 0 | |
| Heavey et al. 41 (Rep. of Ireland) | 1 primary school 2 seconday schoolsa | 3 children 3 adult staff | ‐b | 1 (staff to staff) | 0 | |
| Macartney et al. 42 (Australia) | 10 ECECsc15 schools | 12 students 15 adult staff | 633 (44) | 8 staff 10 students | 1.2% | |
| Ehrhardt et al. 44 (Germany) |
childcare facilities primary schools secondary schools vocational schools |
137 students (only 6 cases led to secondary infection) |
>2300 |
11 students (an additional 4 students were infected from 2 staff members) |
‐ | |
| Stein‐Zamir et al. 47 (Israel) | 1 high school (grades 7–12) | 2 students | 1161 (99) students 151 (99) staff |
153 students 25 staff |
Students: 13.2% Staff: 16.6% |
|
Abbreviations: ECEC, early childhood education and care centers; SAR, secondary attack rate; SARS‐CoV‐2, severe acute respiratory syndrome coronavirus 2.
Author did not specify the type of schools at which the adult staff members worked. Also, no clarification was made about whether more than one of the six cases was present in a single school.
1025 contacts were monitored, symptomatic individuals were referred for testing, but exact numbers are unknown ± ECEC: early childhood education and care centers. Account for daycare, preschool and after‐school care programs.
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