Affiliation: | 1. Influenza Program, Thailand Ministry of Public Health – U.S. Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand;2. Queen Sirikit National Institute of Child Health, Ministry of Public Health, Bangkok, Thailand;3. Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand;4. Influenza Division, U.S. Centers for Disease Control and Prevention, Atlanta, GA, USA |