2023-01-25-世界卫生组织-Cumulative_number_of_confirmed_human_cases_for_avian_influenza_A_H5N1_reported_to_WHO,_2003-2023,_26_January_2023_4页_76kb

报告摘要

Time Period: Data reported by WHO from 2003 to 2023.
Primary Data: Focuses on laboratory-confirmed cases and deaths.
Total Cases/Deaths: 868 reported cases, with 457 deaths as of January 26, 2023. The total number of cases includes deaths (patients cannot be double-counted as both a case and a death).

Data is presented in four segments:
1. 2003-2009: Small absolute numbers, includes very low annual figures. Total cases/deaths for the period are provided.
2. 2010-2014: Slightly higher cases/deaths than the previous four years.
3. 2015-2019: Cases and deaths increase further during this five-year period.
4. Individual years: Data for 2020, 2021, 2022, and 2023 are separate.
The data shows a continuous but relatively low-level presence of human H5N1 infection over the entire period, with peaks in the 2010s. Annual breakdowns for earlier periods (especially 2003-2009 and 2010-2014) are available in subsequent tables.

Dominant Countries: Egypt reported the vast majority of cases and deaths consistently over the entire period.
Significant Cases: China, Vietnam (particularly during 2003-2019), Cambodia, and Indonesia also consistently reported cases, with varying numbers of deaths.
Low Impact Regions: Countries like Canada, the United Kingdom, and the USA reported only a handful or single cases mostly in later years or specific outbreaks.
Other Countries: The remaining countries (Bangladesh, Azerbaijan, Djibouti, Iraq, Lao PDR, Myanmar, Nepal, Nigeria, Pakistan, Turkey) reported significantly fewer cases or only in specific years/periods, and in many cases, deaths were low or zero.

The data only reflects laboratory-confirmed cases.
Cases are based on human onset of illness dates associated with exposure to infected birds or poultry.
Data aggregates for periods (like 2003-2009) might mask significant year-to-year variations within those periods, detailed in follow-up tables. The figures for some years within earlier segments (e.g., specific years under 2003-2009) appear inconsistent or potentially reflective of the aggregate years (not individual years).

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