Table 1.
Summary of interventions and their timing across 17 cities
| Intervention | Number of 17 cities implementing | Median (interquartile range) epidemic stage (CEPID) at time of implementation* |
|---|---|---|
| Making influenza a notifiable disease | 15 | 5.6 (3.1, 25.9) |
| Emergency declarations | 4 | — |
| Isolation policies | 14 | 15.7 (7.6, 30.8) |
| Quarantine of households where infection identified | 5 | — |
| School closures | 14 | 30.8 (15.1, 96.3) |
| Church closures | 15 | 29.9 (12.4, 130.6) |
| Theater closures | 15 | 29.9 (10.3, 66.9) |
| Dance hall closures | 11 | 44.7 (12.4, –) |
| Other closures | 13 | 84.7 (29.9, 322.0) |
| Staggered business hours to reduce congestion in stores and on transit systems | 8 | — |
| Mask ordinances | 2 | — |
| Rules forbidding crowding on streetcars | 6 | — |
| Private funerals | 11 | 92.1 (30.8, –) |
| Bans on door-to-door sales | 1 | — |
| Interventions designed to reduce transmission in the workplace | 0 | — |
| Protective sequestration of children | 3 | — |
| Bans on public gatherings | 15 | 30.8 (12.4, 118.1) |
| No-crowding rules in locations other than transit systems | 3 | — |
| Community-wide business closures | 1 | — |
*Shown only for interventions implemented in at least nine cities (>50%); 75th percentile not shown for interventions implemented in <13 cities.