Journal of Infectious Diseases
15 June 2009  Volume 199, Number 12
http://www.journals.uchicago.edu/toc/jid/current

EDITORIAL COMMENTARY
Avian Influenza A (H5N1) Virus and 2 Fundamental Questions
Sylvie Briand and Keiji Fukuda, Global Influenza Programme, Health and Environment Cluster, World Health Organization, Geneva, Switzerland
“Since 1997, when the avian influenza A (H5N1) virus infected 18 residents of Hong Kong, Special Administrative Region, China, 6 of whom died, 2 questions have been of paramount importance related to this virus. How many other individuals are infected? How are individuals becoming infected?…[discussion of three studies cited below…]

Risk Factors for Human Illness with Avian Influenza A (H5N1) Virus Infection in China
Lei Zhou, Qiaohong Liao, Libo Dong, Yang Huai, Tian Bai, Nijuan Xiang, Yuelong Shu, Wei Liu, Shiwen Wang, Pengzhe Qin, Min Wang, Xuesen Xing, Jun Lv, Ray Y. Chen, Zijian Feng, Weizhong Yang, Timothy M. Uyeki, and Hongjie Yu

Ecologic Risk Factor Investigation of Clusters of Avian Influenza A (H5N1) Virus Infection in Thailand
Thanawat Tiensin, Syed Sayeem Uddin Ahmed, Suvichai Rojanasthien, Thaweesak Songserm, Parntep Ratanakorn, Kridsada Chaichoun, Wantanee Kalpravidh, Surapong Wongkasemjit, Tuangthong Patchimasiri, Karoon Chanachai, Weerapong Thanapongtham, Suwit Chotinan, Arjan Stegeman, and Mirjam Nielen

Risk Factors Associated with Subclinical Human Infection with Avian Influenza A (H5N1) Virus—Cambodia, 2006
Sirenda Vong, Sowath Ly, Maria D. Van Kerkhove, Jenna Achenbach, Davun Holl, Philippe Buchy, San Sorn, Heng Seng, Timothy M. Uyeki, Touch Sok, and Jacqueline M. Katz