Annual summary of influenza activity, ILI outpatient visit rate, hospitalisation rate, and mortality rate in Shanghai, 2010–2017
| 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | |
| Influenza A(H1N1) (%) | 30 (17.24) | 54 (40.00) | 0 (0.00) | 32 (19.88) | 56 (15.34) | 68 (14.17) | 138 (30.53) | 31 (5.09) |
| Influenza A(H3N2) (%) | 45 (25.86) | 1 (0.74) | 155 (56.99) | 128 (79.50) | 220 (60.27) | 272 (56.67) | 226 (50.00) | 380 (62.40) |
| Influenza B (%) | 99 (56.90) | 80 (59.26) | 117 (43.01) | 1 (0.62) | 89 (24.38) | 140 (29.17) | 88 (19.47) | 198 (32.51) |
| Total specimens tested | 974 | 755 | 1026 | 1231 | 1935 | 2127 | 2093 | 2142 |
| ILI consultation rate* | 26.73 | 22.31 | 20.99 | 23.00 | 23.94 | 25.85 | 25.00 | 32.18 |
| ILI outpatient visit rate† | 4681.27 | 4120.52 | 4152.99 | 4633.98 | 5173.12 | 5889.30 | 5685.84 | 7577.41 |
| Hospitalisations rate‡ | ||||||||
| R&C | – | – | – | 1897.31 | 2131.63 | 2396.44 | 2557.96 | 2801.40 |
| Respiratory disease | – | – | – | 672.00 | 776.21 | 850.69 | 877.10 | 971.29 |
| Circulatory disease | – | – | – | 1225.31 | 1355.42 | 1545.75 | 1680.86 | 1830.12 |
| Mortality rate§ | ||||||||
| R&C | 351.16 | 359.94 | 385.52 | 381.45 | 399.40 | 428.57 | 414.33 | 416.38 |
| Respiratory disease | 82.15 | 79.42 | 85.13 | 78.70 | 80.80 | 83.19 | 74.40 | 71.13 |
| Circulatory disease | 269.01 | 280.51 | 300.39 | 302.74 | 318.60 | 345.38 | 339.93 | 345.25 |
| Registered population | 14 123 202 | 14 193 600 | 14 269 319 | 14 323 391 | 14 386 900 | 14 429 676 | 14 499 990 | 14 551 300 |
| Permanent population | 23 019 196 | 23 474 591 | 23 804 303 | 24 151 500 | 24 256 797 | 24 152 700 | 24 197 001 | 24 197 001 |
Influenza surveillance data were recorded in Pudong New Area, including specimens positive for influenza by type/subtype, total specimens tested, ILI consultations and total outpatient visits
*ILI consultation rate per 1000 outpatient visits.
†ILI outpatient visit rate per 100 000 permanent population.
‡Hospitalisation rate per 100 000 permanent population.
§Mortality rate per 100 000 registered population.
ILI, influenza-like illness; R&C, respiratory and circulatory disease.