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 4. Average influenza A (H9N2) isolation rates by calendar day during the period with no rest-day and by days after a rest-day during the period with rest-days, for chickens (A) and minor poultry (B). Open circles denote the isolation rates on each calendar day averaged over the entire period, with 95% confidence intervals. Overall mean isolation rates for each period and poultry type are indicated by the dotted horizontal lines.
The opinions expressed by authors contributing to this journal do not necessarily reflect the opinions of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.