2021-09-30-世界卫生组织-Cumulative_number_of_confirmed_human_cases_for_avian_influenza_A_H5N1_reported_to_WHO,_2003-2021,_1_October_2021_4页_76kb

WHO H5N1 Human Cases Summary (2003-2021)

Overall

• Cases and deaths are grouped by time periods.
• 2003-2009: 468 cases, 282 deaths.
• 2010-2014: 48 cases, 24 deaths.
• 2015-2019: 145 cases, 42 deaths.
• 2020-2021: 689 cases (863 total), 432 deaths (456 total). Death counts reflect the proportionality noted.

Cases by Year (Approximate Trend - data breakdown by year available separately)

• 2003-2009: Notable cases in Cambodia/Indonesia (2005), China (various peaks early), Vietnam (2003, 2005).
• 2010-2014: Mostly lower numbers, except some years with cases in China, Egypt, Indonesia, Vietnam.
• 2015-2019: Cases appear concentrated, primarily in Egypt, China, Indonesia, with a peak in Egypt in 2016-2017.
• 2020-2021: Significant increase in reported cases compared to preceding years, with the largest numbers seen in Egypt, followed by China, Indonesia, and Vietnam.

High Burden Countries (Across Periods)

Countries consistently or repeatedly reported significant numbers:

• Cambodia: Highest total cases reported. Large peak in 2005.
• China: Multiple case peaks (especially 2003-2005, 2014).
• Egypt: Constant presence with high average burden (tens to over hundred cases/year).
• Indonesia: Very high case numbers, particularly peak in 2006.
• Viet Nam: High burden in 2003, 2005, 2020-2021.

Data Source Notes

• WHO tracks laboratory-confirmed cases.
• Includes total cases which encompass deaths.
• Dates refer to illness onset.