Avian Influenza and Ban on Overnight Poultry Storage in Live Poultry Markets, Hong Kong
Y.H. Connie Leung1, Eric H.Y. Lau1, Li Juan Zhang, Yi Guan2, Benjamin J. Cowling2, and J.S. Malik Peiris2
Author affiliations: Li Ka Shing Faculty of Medicine School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, People’s Republic of China (Y.H.C. Leung, E.H.Y. Lau, B.J. Cowling, J.S.M. Peiris); and State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong, Hong Kong (L.J. Zhang, Y. Guan)
Figure. . . Weekly influenza virus A (H9N2) isolation rates for chickens (A) and minor poultry (B) in live poultry markets, Hong Kong, September 1999–May 2011. Vertical lines denote periods for different interventions: I, no rest day; II, 1 monthly rest day with quail sold in live poultry markets; III, 1 monthly rest day with no sales of quail in live poultry markets; IV,: 2 monthly rest days; V, ban on keeping live poultry overnight in live poultry markets.
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