5Yuen KY,Chan PK,Peiris M,et al.Clinical features and rapid viral diagnosis of human disease associated with avian influenza A H5N1 virus.Lancet,1998,351:467-471.
6WHO.Cumulative number of confirmed human cases of avian influenza A/(H5N1) reported to WHO.http://www.who.int/csr/disease/avian _ influenza/country/cases _ table_2006_06_20/en/index.html
7Nguyen TL.World Health Organization International Avian InfluenzaInvestigation Team,Vietnam,and Wilina Lim.Lack of H5N1 avian influenza transmission to hospital employees,Hanoi,2004.Emerg Infect Dis,www.cdc.gov/eid Vol.11,No.2,February 2005.
8Ungchusak K,Auewarakul P,Dowell SF,et al.Probable person to person transmission of avian influenza A(H5N1).NEJM,2005,352:333-340.
