2012-06-24-世界卫生组织-Influenza_at_the_human-animal_interface_summary_and_assessment,_25_June_2012_3页_236kb

Overall Summary of Human-Avian Influenza Interface as of June 25, 2012:

• 606 cases of avian influenza A(H5N1) were reported globally by WHO between 2003 and June 2012, with 357 deaths. From January 2012 to June 2012, 28 cases were reported, including one new case from Egypt in April 2012 linked to backyard poultry exposure.

Egypt-Specific Trends:

• In Egypt, H5N1 cases peaked in previous years but decreased to 10 cases in the first six months of 2012 compared to 39 in 2011. The median age of cases increased to 31.5 years, and in children under ten years, survival rates improved from lower previous years.

Global Epidemiology:

• A(H5N1) viruses are endemic in poultry in several countries, including China, Egypt, Indonesia, Viet Nam, Bangladesh, India, and Cambodia. Cases follow seasonal patterns, with higher incidence during winter months, suggesting links to bird outbreaks.

Risk Assessment:

• No evidence of sustained human-to-human transmission based on available data. All cases of non-human influenza viruses are reportable under the International Health Regulations (2005).

Additional Notes:

• Key sources for further information include WHO, OIE, FAO, and OFFLU websites.