Table 1. Numbers of PUE cases and influenza A(H7N9) virus infections reported by PUE surveillance, mainland China, March 30–May 3, 2013*.

Province or municipality	No. cases reported	No. (%) A(H7N9) positive
Affected, n = 10
Anhui	100	0
Beijing	33	1 (3)
Fujian	17	3 (18)
Henan	11	3 (27)
Hunan	6	2 (33)
Jiangsu	27	20 (74)
Jiangxi	42	4 (10)
Shandong	10	0
Shanghai	468	20 (4)
Zhejiang	288	41 (14)
Unaffected, n = 21	116	0
Total	1118	94 (8)

*PUE, pneumonia of unknown etiology.