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Table 2 Five epidemics of avian influenza A (H7N9) virus in humans in 2013–17 (%)

From: Spatial and temporal clusters of avian influenza a (H7N9) virus in humans across five epidemics in mainland China: an epidemiological study of laboratory-confirmed cases

Province First epidemic (2013.1–2013.9) Second epidemic (2013.10–2014.9) Third epidemic (2014.10–2015.9) Fourth epidemic (2015.10–2016.9) Fifth epidemic (2016.10–2017.9) Total Rank
Zhejiang 45 (13.89) 93 (28.70) 46 (14.20) 36 (11.11) 104 (32.10) 324 1
Guangdong 1 (0.39) 105 (40.70) 73 (28.68) 15 (5.81) 64 (24.42) 258 2
Jiangsu 28 (11.72) 27 (11.30) 23 (9.62) 26 (10.88) 135 (56.49) 239 3
Anhui 5 (4.55) 14 (12.73) 14 (13.64) 5 (4.55) 71 (64.55) 109 4
Fujian 5 (4.67) 17 (15.89) 41 (38.32) 10 (9.35) 34 (31.78) 107 5
Hunan 2 (2.11) 22 (23.16) 2 (2.11) 8 (8.42) 61 (64.21) 95 6
Shanghai 33 (60.00) 8 (14.55) 6 (10.91) 2 (3.64) 6 (10.91) 55 7
Jiangxi 6 (11.32) 2 (3.77) 3 (5.66) 3 (5.66) 39 (73.58) 53 8
Sichuan 0 (0) 0 (0) 0 (0) 0 (0) 39 (100.00) 40 9
Beijing 2 (5.88) 3 (8.82) 2 (5.88) 3 (8.82) 24 (70.59) 34 10
Guangxi 0 (0) 3 (9.38) 0 (0) 0 (0) 29 (90.63) 32 11
Hebei 1 (3.13) 0 (0) 0 (0) 3 (9.38) 28 (87.50) 32 12
Henan 4 (12.50) 0 (0) 0 (0) 1 (3.13) 27 (84.38) 32 13
Hubei 0 (0) 0 (0) 1 (3.13) 1 (3.13) 30 (93.75) 32 14
Shandong 2 (7.14) 3 (10.71) 1 (3.57) 3 (10.71) 19 (67.86) 28 15
Guizhou 0 (0) 1 (5.00) 1 (5.00) 0 (0) 18 (90.00) 20 16
Xinjiang 0 (0) 2 (15.38) 8 (61.54) 0 (0) 3 (23.08) 13 17
Chongqing 0 (0) 0 (0) 0 (0) 0 (0) 9 (100.00) 9 18
Shaanxi 0 (0) 0 (0) 0 (0) 0 (0) 7 (100.00) 7 19
Liaoning 0 (0) 0 (0) 0 (0) 1 (16.67) 5 (83.33) 6 20
Yunnan 0 (0) 0 (0) 0 (0) 0 (0) 6 (100.00) 6 21
Gansu 0 (0) 0 (0) 0 (0) 0 (0) 5 (100.00) 5 22
Tianjin 0 (0) 0 (0) 0 (0) 2 (40.00) 3 (60.00) 5 23
Jilin 0 (0) 2 (66.67) 0 (0) 0 (0) 1 (33.33) 3 24
Shanxi 0 (0) 0 (0) 0 (0) 0 (0) 3 (100.00) 3 25
Xizang 0 (0) 0 (0) 0 (0) 0 (0) 3 (100.00) 3 26
Inner Mongolia 0 (0) 0 (0) 0 (0) 0 (0) 2 (100.00) 2 27
Total 134 (8.63) 302 (19.46) 221 (14.43) 119 (7.67) 776 (50.00) 1553