2011-08-02-世界卫生组织-Influenza_at_the_human-animal_interface_summary_and_assessment,_3_August_2011_2页_219kb

Human infections with avian influenza H5N1 peaked with 563 confirmed cases globally as of August 3, 2011, including 330 deaths. Cases were limited to 15 countries, with minimal human-to-human transmission observed. In the past month, only one case was reported in Cambodia, involving a fatal infection in a 4-year-old child exposed to dead poultry. This marked the highest number of H5N1 cases in Cambodia for 2011, all in children and with a 100% case fatality rate. The virus persists in poultry, particularly in Clade 1 in Cambodia and neighboring regions. Animal outbreaks show a slight decline, attributed to seasonal factors, but human cases remain possible due to ongoing poultry circulation, especially in endemic areas.