Table 2.
Positivity rates in different districts of China in both periods
| District | Sample type | Positive | Negative | Positive rate (%) |
|---|---|---|---|---|
| Period 1 | ||||
| Zhengzhou | NPS | 88 | 76 | 53.7% |
| Changsha | NPS | 201 | 176 | 53.3% |
| Shenyang | NPS | 44 | 153 | 22.3% |
| Chongqing | NPS | 162 | 27 | 85.7% |
| Shenzhen | NPS | 79 | 115 | 40.7% |
| Beijing | NPS | 91 | 142 | 39.1% |
| Shanghai | NPS | 111 | 78 | 58.7% |
| Total | / | 776 | 767 | 50.3% |
| Period 2 | ||||
| Guangzhou | NPS | 36 | 76 | 32.1% |
| Shenyang | NPS | 31 | 44 | 41.3% |
| Wenzhou | NPS | 117 | 43 | 73.1% |
| Beijing | NPS | 55 | 92 | 37.4% |
| Guiyang | NPS | 62 | 73 | 45.9% |
| Total | / | 301 | 328 | 47.9% |
NPS: nasopharyngeal swab