Skip to main content

Table 2 Exposure History of Influenza A(H7N9) Case-Patients During the First (March 31-September 30, 2013), Second (October 1, 2013 – September 30, 2014) and Third (October 1, 2014 – September 30, 2015) Waves of H7N9 Virus Circulation

From: Comparison of the first three waves of avian influenza A(H7N9) virus circulation in the mainland of the People’s Republic of China

Exposure Wave 1(N = 127) Wave 2(N = 296) Wave 3(N = 207)
Exposure to poultry 26 (20.5) 56 (19.0) 50 (24.2)
Exposure to live bird markets (LPM) 84 (66.1) 203 (68.6) 136 (65.7)
 Working at a LPM 15 (17.9) 40 (19.7) 12 (8.8)
 Visiting of LPMs 69 (82.1) 163 (80.3) 124 (91.2)
No exposure to poultry 13 (10.2) 27 (9.1) 16 (7.7)
Possible limited H-H transmission 4 (3.1) 7 (2.3) 4 (1.9)
Both possible limited H-H transmission and common exposure to poultry - 3 (1.0) 1 (0.5)
  1. H-H Human-to-Human Transmission