Effect of Interventions on Influenza A (H9N2) Isolation in Hong Kong’s Live Poultry Markets, 1999–2005
Eric H.Y. Lau*1, Y.H. Connie Leung*1, Li Juan Zhang*, Benjamin J. Cowling*, Sin Ping Mak†, Yi Guan*, Gabriel M. Leung* , and J. S. Malik Peiris*
Author affiliations: *The University of Hong Kong, Hong Kong Special Administrative Region, People’s Republic of China; †Government of the Hong Kong Special Administrative Region, People’s Republic of China;
Figure 3. Weekly influenza A (H9N2) isolation rates for chickens (A) and minor poultry (B) in Hong Kong, September 1999–December 2005. Dotted lines denote the different periods: I, no rest-day; II, 1 rest-day with quails sold in live poultry markets; III, 1 rest-day with quails removed from live poultry markets; IV, 2 rest-days.
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