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Distribution of studies (N = 81) and reinfection cases (N = 577) according to country of origin included in the review.
| Country | Number of studies | Number of reinfection cases |
|---|---|---|
| Belgium | 2 | 2 |
| Brazil | 7 | 45 |
| China | 28 | 423 |
| Colombia | 1 | 1 |
| Ecuador | 1 | 1 |
| France | 5 | 19 |
| Hong Kong | 3 | 3 |
| India | 4 | 8 |
| Iraq | 1 | 26 |
| Israel | 1 | 1 |
| Italy | 4 | 4 |
| Iran | 1 | 9 |
| Netherlands | 1 | 1 |
| Pakistan | 1 | 1 |
| Peru | 1 | 1 |
| Portugal | 1 | 1 |
| Qatar | 1 | 1 |
| UK | 3 | 8 |
| USA | 11 | 14 |
| Turkey | 2 | 3 |
| Switzerland | 1 | 1 |
| Korea | 1 | 4 |
| Total | 81 | 577 |
