2022-10-04-世界卫生组织-Cumulative_number_of_confirmed_human_cases_for_avian_influenza_A_H5N1_reported_to_WHO,_2003-2022,_5_October_2022_4页_78kb

Summary of Cumulative Confirmed Human Cases for Avian Influenza A(H5N1) Reported to WHO, 2003-2022

Core Content

This document provides the cumulative number of confirmed human cases and deaths from avian influenza A(H5N1) reported to the World Health Organization (WHO) from 2003 to 2022. The data includes laboratory-confirmed cases only and is based on the onset of illness.

Key Information

• Total Cases and Deaths (2003-2022):

  • Total Cases: 865
  • Total Deaths: 456

• WHO Reporting Criteria:

  • Only laboratory-confirmed cases are included.
  • All dates refer to the onset of illness.

• Country-wise Breakdown

2003-2009

• Total Cases: 468
• Total Deaths: 282
• Countries with Cases:
  • Azerbaijan: 8 cases, 5 deaths
  • Bangladesh: 1 case, 0 deaths
  • Cambodia: 9 cases, 7 deaths
  • China: 38 cases, 25 deaths
  • Djibouti: 1 case, 0 deaths
  • Egypt: 90 cases, 27 deaths
  • India: 0 cases, 0 deaths
  • Indonesia: 162 cases, 134 deaths
  • Iraq: 3 cases, 2 deaths
  • Lao People's Democratic Republic: 2 cases, 2 deaths
  • Myanmar: 1 case, 0 deaths
  • Nepal: 0 cases, 0 deaths
  • Nigeria: 1 case, 1 death
  • Pakistan: 3 cases, 1 death
  • Thailand: 25 cases, 17 deaths
  • Turkey: 12 cases, 4 deaths
  • United Kingdom: 0 cases, 0 deaths
  • Viet Nam: 112 cases, 57 deaths

2010-2014

• Total Cases: 233
• Total Deaths: 125
• Countries with Cases:
  • Bangladesh: 6 cases, 1 death
  • Cambodia: 47 cases, 30 deaths
  • Canada: 1 case, 1 death
  • China: 9 cases, 5 deaths
  • Egypt: 120 cases, 50 deaths
  • Indonesia: 35 cases, 31 deaths
  • Viet Nam: 15 cases, 7 deaths

2015-2019

• Total Cases: 160
• Total Deaths: 48
• Countries with Cases:
  • Bangladesh: 1 case, 0 deaths
  • Cambodia: 4 cases, 3 deaths
  • China: 6 cases, 1 death
  • Egypt: 149 cases, 43 deaths
  • Indonesia: 3 cases, 3 deaths
  • Nepal: 1 case, 1 death
  • Viet Nam: 11 cases, 5 deaths

2020-2022

• Total Cases: 11
• Total Deaths: 6
• Countries with Cases:
  • United Kingdom: 1 case, 0 deaths
  • United States of America: 1 case, 0 deaths
  • Viet Nam: 1 case, 0 deaths

Main Trends

• Highest Cases and Deaths:

  • Egypt had the highest number of cases and deaths throughout the period, with 359 cases and 120 deaths from 2003 to 2022.
  • Indonesia had the second-highest number of cases, with 200 cases and 168 deaths from 2003 to 2022.
  • Viet Nam had a significant number of cases in the early years but saw a decline in later years.

• Decline in Cases and Deaths Over Time:

  • The number of reported cases and deaths decreased significantly from 2015 onwards, especially in 2020-2022, indicating a possible reduction in the spread of the virus or improved surveillance and control measures.

• Geographical Distribution:

  • The majority of cases were reported in Asia, particularly in Egypt, Indonesia, and Viet Nam.
  • Cases were also reported in other regions, including Africa (e.g., Azerbaijan, Djibouti, Nigeria) and the Americas (e.g., Canada, United States of America).

• Notable Exceptions:

  • India, Lao People's Democratic Republic, and Pakistan reported very few or no cases after the initial years.
  • Nepal reported only 1 case in 2019.

Conclusion

The cumulative data shows that avian influenza A(H5N1) has been primarily reported in Asia, with Egypt and Indonesia being the most affected countries. The number of cases and deaths decreased over the years, especially from 2015 to 2022, suggesting a possible trend of containment or reduced transmission. The WHO reports only laboratory-confirmed cases, which may affect the completeness of the data.