Volume 20, Number 9—September 2014
Dispatch
Asymptomatic, Mild, and Severe Influenza A(H7N9) Virus Infection in Humans, Guangzhou, China
Table 1
Investigation of weekly reported number of patients with pneumonia, PUE, and ILI and confirmed cases of influenza A(H7N9) virus infection, Guangzhou, China, April 1, 2013–March 7, 2014*
Year, wk | PUE surveillance |
ILI surveillance |
|||||
---|---|---|---|---|---|---|---|
No. patients with pneumonia | No. (%) patients with PUE | No. confirmed influenza A(H7N9) infections | No. patients with ILI | No. (%) samples tested | No. confirmed influenza A(H7N9) infections | ||
2013 | |||||||
14 | 951 | 22 (2.3) | 0 | 8,089 | 47 (0.6) | 0 | |
15 | 996 | 28 (2.8) | 0 | 8,555 | 65 (0.8) | 0 | |
16 | 1,021 | 36 (3.5) | 0 | 8,698 | 55 (0.6) | 0 | |
17 | 1,087 | 44 (4.1) | 0 | 8,759 | 63 (0.7) | 0 | |
18 | 1,118 | 48 (4.3) | 0 | 9,852 | 43 (0.4) | 0 | |
19 | 1,146 | 62 (5.4) | 0 | 8,682 | 68 (0.8) | 0 | |
20 | 1,238 | 65 (5.4) | 0 | 9,621 | 55 (0.6) | 0 | |
21 | 1,197 | 55 (4.6) | 0 | 10,248 | 64 (0.6) | 0 | |
22 | 1,121 | 48 (4.3) | 0 | 11,264 | 83 (0.7) | 0 | |
23 | 1,166 | 41 (3.5) | 0 | 9,546 | 82 (0.9) | 0 | |
24 | 1,041 | 37 (3.6) | 0 | 9,962 | 81 (0.8) | 0 | |
25 | 1,075 | 42 (3.9) | 0 | 8,910 | 96 (1.1) | 0 | |
26 | 1,032 | 35 (3.4) | 0 | 7,735 | 68 (0.9) | 0 | |
27 | 976 | 31 (3.2) | 0 | 7,431 | 80 (1.1) | 0 | |
28 | 922 | 28 (3.0) | 0 | 7,567 | 83 (1.1) | 0 | |
29 | 945 | 26 (2.8) | 0 | 7,306 | 80 (1.1) | 0 | |
30 | 908 | 28 (3.1) | 0 | 6,998 | 82 (1.2) | 0 | |
31 | 887 | 20 (2.3) | 0 | 7,824 | 76 (1.0) | 0 | |
32 | 911 | 17 (1.9) | 0 | 7,484 | 74 (1.0) | 0 | |
33 | 848 | 19 (2.2) | 0 | 7,176 | 82 (1.1) | 0 | |
34 | 925 | 11 (1.2) | 0 | 8,018 | 85 (1.1) | 0 | |
35 | 883 | 16 (1.8) | 0 | 8,186 | 84 (1.0) | 0 | |
36 | 856 | 11 (1.3) | 0 | 8,768 | 85 (1.0) | 0 | |
37 | 833 | 13 (1.6) | 0 | 9,549 | 86 (0.9) | 0 | |
38 | 821 | 12 (1.5) | 0 | 8,788 | 82 (0.9) | 0 | |
39 | 773 | 14 (1.8) | 0 | 7,217 | 73 (1.0) | 0 | |
40 | 844 | 17 (2.0) | 0 | 6,448 | 68 (1.1) | 0 | |
41 | 755 | 12 (1.6) | 0 | 5,513 | 63 (1.1) | 0 | |
42 | 721 | 10 (1.4) | 0 | 5,284 | 79 (1.5) | 0 | |
43 | 733 | 16 (2.2) | 0 | 5,746 | 73 (1.3) | 0 | |
44 | 766 | 18 (2.4) | 0 | 6,599 | 70 (1.1) | 0 | |
45 | 803 | 26 (3.2) | 0 | 5,655 | 75 (1.3) | 0 | |
46 | 846 | 28 (3.3) | 0 | 4,234 | 83 (2.0) | 0 | |
47 | 815 | 42 (5.2) | 0 | 5,054 | 82 (1.6) | 0 | |
48 | 859 | 40 (4.7) | 0 | 4,683 | 95 (2.0) | 0 | |
49 | 935 | 46 (4.9) | 0 | 5,493 | 101 (1.8) | 0 | |
50 | 947 | 51 (5.4) | 0 | 5,488 | 112 (2.0) | 0 | |
51 | 1,004 | 43 (4.3) | 0 | 4,151 | 117 (2.8) | 0 | |
52 |
1,066 |
52 (4.9) |
0 |
4,840 |
119 (2.5) |
0 |
|
2014 | |||||||
01 | 1,124 | 62 (5.5) | 0 | 6,497 | 113 (1.7) | 0 | |
02 | 1,091 | 70 (6.4) | 1 | 7,313 | 121 (1.7) | 0 | |
03 | 1,198 | 79 (6.6) | 3 | 6,401 | 126 (2.0) | 0 | |
04 | 1,257 | 91 (7.2) | 0 | 6,089 | 118 (1.9) | 0 | |
05 | 1,286 | 86 (6.7) | 1 | 6,048 | 105 (1.7) | 1 | |
06 | 845 | 32 (3.8) | 1 | 4,656 | 68 (1.5) | 1 | |
07 | 1,036 | 86 (8.3) | 5 | 4,172 | 98 (2.4) | 1 | |
08 | 1,122 | 70 (6.2) | 4 | 4,340 | 113 (2.6) | 0 | |
09 | 1,123 | 77 (6.9) | 1 | 6,850 | 111 (1.6) | 0 | |
10 | 1,084 | 63 (5.8) | 1 | 5,925 | 117 (2.0) | 0 | |
Total | 47,934 | 1923 (4.0) | 16 | 349,712 | 4,149 (1.2) | 3 |
*Real-time reverse transcription PCR testing for influenza A(H7N9) virus was implemented in April 1, 2013 (2013 week 14). Samples were collected from all patients with PUE and were laboratory tested. PUE, pneumonia of unknown etiology; ILI, influenza-like illness.
1These first authors contributed equally to this article.
2These senior authors contributed equally to this article.