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Confirmed cases and infection rates in incoming immigrants and local residents in three of the studied REGIONs.
| REGION | Incoming immigrants (n) | Local residents (n) | Local infection rate (%) |
| Shanghai | 99 | 207 | 67.6 |
| Beijing | 25 | 352 | 93.4 |
| Tianjin | 6 | 106 | 94.6 |
