TY - JOUR AU - Millman, Alexander AU - Havers, Fiona AU - Iuliano, A. Danielle AU - Davis, C. Todd AU - Sar, Borann AU - Sovann, Ly AU - Chin, Savuth AU - Corwin, Andrew AU - Vongphrachanh, Phengta AU - Douangngeun, Bounlom AU - Lindblade, Kim AU - Chittaganpitch, Malinee AU - Kaewthong, Viriya AU - Kile, James AU - Nguyen, Hien AU - Pham, Dong AU - Donis, Ruben AU - Widdowson, Marc-Alain T1 - Detecting Spread of Avian Influenza A(H7N9) Virus Beyond China T2 - Emerging Infectious Disease journal PY - 2015 VL - 21 IS - 5 SP - 741 SN - 1080-6059 AB - During February 2013–March 2015, a total of 602 human cases of low pathogenic avian influenza A(H7N9) were reported; no autochthonous cases were reported outside mainland China. In contrast, since highly pathogenic avian influenza A(H5N1) reemerged during 2003 in China, 784 human cases in 16 countries and poultry outbreaks in 53 countries have been reported. Whether the absence of reported A(H7N9) outside mainland China represents lack of spread or lack of detection remains unclear. We compared epidemiologic and virologic features of A(H5N1) and A(H7N9) and used human and animal influenza surveillance data collected during April 2013–May 2014 from 4 Southeast Asia countries to assess the likelihood that A(H7N9) would have gone undetected during 2014. Surveillance in Vietnam and Cambodia detected human A(H5N1) cases; no A(H7N9) cases were detected in humans or poultry in Southeast Asia. Although we cannot rule out the possible spread of A(H7N9), substantial spread causing severe disease in humans is unlikely. KW - Influenza KW - A(H7N9) KW - A(H5N1) KW - surveillance KW - viruses KW - China KW - Vietnam KW - Cambodia KW - Laos KW - Thailand KW - Southeast Asia KW - poultry KW - respiratory infections DO - 10.3201/eid2105.141756 UR - https://wwwnc.cdc.gov/eid/article/21/5/14-1756_article ER - End of Reference