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Distribution of family clustered events of SARS-CoV-2 infection in Taiwan.
| Size of Family cluster | Total reported cases | Transmission mode |
Frequency of clusters | |
|---|---|---|---|---|
| Index case | Secondary case | |||
| Before 2021 | ||||
| 2 | 2 | 1 | 1 | 11 |
| 3 | 1 | 1 | 0 | 1 |
| 3 | 2 | 1 | 1 | 4 |
| 3 | 3 | 1 | 2 | 3 |
| 4 | 1 | 1 | 0 | 1 |
| 4 | 2 | 1 | 1 | 5 |
| 4 | 3 | 1 | 2 | 1 |
| 4 | 4 | 4 | 0 | 1 |
| 5 | 2 | 1 | 1 | 5 |
| 6 | 3 | 1 | 2 | 1 |
| 11 | 3 | 2 | 1 | 1 |
| After 2021 | ||||
| 4 | 1 | 1 | 0 | 1 |
| 5 | 3 | 1 | 2 | 3 |
| 6 | 6 | 1 | 5 | 1 |
