Table 1.
Demographic characteristics of malaria cases from the bordering countries reported in China, 2017–2021.
| Demographic characteristics | Yearly number of cases (number, %) |
Total | ||||
|---|---|---|---|---|---|---|
| 2017 | 2018 | 2019 | 2020 | 2021 | ||
| Country | ||||||
| Myanmar | 315 (78.6) | 205 (84.0) | 173 (83.6) | 160 (95.2) | 137 (91.3) | 990 (84.6) |
| Pakistan | 66 (16.5) | 26 (10.7) | 21 (10.1) | 6 (3.6) | 11 (7.3) | 130 (11.1) |
| Laos | 13 (3.2) | 5 (2.0) | 4 (1.9) | 1 (0.6) | 1 (0.7) | 24 (2.1) |
| India | 5 (1.2) | 7 (2.9) | 5 (2.4) | 1 (0.6) | 0 (0) | 18 (1.5) |
| Vietnam | 1 (0.2) | 1 (0.4) | 4 (1.9) | 0 (0) | 1 (0.7) | 7 (0.6) |
| Bhutan | 1 (0.2) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 1 (0.1) |
| Plasmodium species | ||||||
| Pf | 20 (5.0) | 9 (3.7) | 2 (1.0) | 1 (0.6) | 2 (1.3) | 34 (2.9) |
| Pv | 375 (93.5) | 225 (92.2) | 198 (95.7) | 165 (98.2) | 146 (97.3) | 1109 (94.8) |
| Po | 3 (0.7) | 3 (1.2) | 4 (1.9) | 0 (0) | 1 (0.7) | 11 (0.9) |
| Pm | 2 (0.5) | 3 (1.2) | 1 (0.5) | 0 (0) | 1 (0.7) | 7 (0.6) |
| Mixed | 1 (0.2) | 4 (1.6) | 2 (1.0) | 2 (1.2) | 0 (0) | 9 (0.8) |
| Gender | ||||||
| Male | 301 (75.1) | 192 (78.7) | 163 (78.7) | 137 (81.5) | 119 (79.3) | 912 (77.9) |
| Female | 100 (24.9) | 52 (21.3) | 44 (21.3) | 31 (18.5) | 31 (20.7) | 258 (22.1) |
| Age (years) | ||||||
| <10 | 19 (4.7) | 13 (5.3) | 3 (1.4) | 7 (4.2) | 7 (4.7) | 49 (4.2) |
| <20 | 36 (9.0) | 19 (7.8) | 11 (5.3) | 16 (9.5) | 14 (9.3) | 96 (8.2) |
| <30 | 72 (18.0) | 51 (20.9) | 48 (23.2) | 36 (21.4) | 36 (24.0) | 243 (20.8) |
| <40 | 98 (24.4) | 61 (25.0) | 53 (25.6) | 47 (28.0) | 21 (14.0) | 280 (23.9) |
| <50 | 104 (25.9) | 52 (21.3) | 46 (22.2) | 36 (21.4) | 39 (26.0) | 277 (23.7) |
| <60 | 55 (13.7) | 32 (13.1) | 35 (16.9) | 20 (11.9) | 26 (17.3) | 168 (14.4) |
| ≥60 | 17 (4.2) | 16 (6.6) | 11 (5.3) | 6 (3.6) | 7 (4.7) | 57 (4.9) |
| Occupation | ||||||
| Migrant workers | 218 (54.4) | 132 (54.1) | 99 (47.8) | 81 (48.2) | 58 (38.7) | 588 (50.3) |
| Visitors | 98 (24.4) | 48 (19.7) | 38 (18.4) | 29 (17.3) | 10 (6.7) | 223 (19.1) |
| Bussinessmen | 19 (4.7) | 16 (6.6) | 15 (7.2) | 5 (3.0) | 3 (2.0) | 58 (5.0) |
| Civil servants | 4 (1.0) | 3 (1.2) | 6 (2.9) | 1 (0.6) | 4 (2.7) | 18 (1.5) |
| Travelers | 2 (0.5) | 1 (0.4) | 3 (1.4) | 1 (0.6) | 0 (0) | 7 (0.6) |
| Others | 60 (15.0) | 44 (18.0) | 46 (22.2) | 51 (30.4) | 75 (50.0) | 276 (23.6) |
| Total | 401 | 244 | 207 | 168 | 150 | 1170 |