2023-10-02-世界卫生组织-Cumulative_number_of_confirmed_human_cases_for_avian_influenza_A_H5N1_reported_to_WHO,_2003-2023,_3_October_2023_4页_118kb

Summary of Cumulative Confirmed Human Cases for Avian Influenza A(H5N1) Reported to WHO (2003-2023)

Core Content

This document provides the cumulative number of confirmed human cases of avian influenza A(H5N1) reported to the World Health Organization (WHO) from 2003 to 2023, with breakdowns by year. The data includes both the total number of cases and the corresponding number of deaths, with the understanding that the total cases include deaths. The WHO only reports laboratory-confirmed cases, and all dates refer to the onset of illness.

Main Viewpoints

• WHO Reporting Standards: The WHO reports only laboratory-confirmed cases, and the data is based on the onset of illness.
• Inclusion of Asymptomatic Cases: The count includes cases where infection was confirmed in asymptomatic individuals.
• Uncertainty in Diagnosis: In some instances, the distinction between infection and transient viral contamination remains inconclusive.
• Global Distribution: The majority of cases were reported in countries such as Egypt, Vietnam, and Cambodia, with relatively fewer cases in other regions.

Key Information

Total Cases and Deaths by Period

Country-Specific Breakdown

• Azerbaijan: 8 cases, 5 deaths
• Bangladesh: 8 cases, 1 death
• Cambodia: 58 cases, 38 deaths
• Canada: 1 case, 1 death
• Chile: 1 case, 0 deaths
• China: 55 cases, 32 deaths
• Djibouti: 1 case, 0 deaths
• Ecuador: 1 case, 0 deaths
• Egypt: 359 cases, 120 deaths
• India: 1 case, 1 death
• Indonesia: 200 cases, 168 deaths
• Iraq: 3 cases, 2 deaths
• Lao People's Democratic Republic: 3 cases, 2 deaths
• Myanmar: 1 case, 0 deaths
• Nepal: 1 case, 1 death
• Nigeria: 1 case, 1 death
• Pakistan: 3 cases, 1 death
• Spain: 2 cases, 0 deaths
• United Kingdom: 5 cases, 0 deaths
• United States of America: 1 case, 0 deaths
• Viet Nam: 128 cases, 64 deaths

Trends Over Time

• 2003-2009: Highest number of cases and deaths, with Egypt and Indonesia being major contributors.
• 2010-2014: Slight decrease in the number of cases and deaths compared to the previous period, but still high in Egypt and Indonesia.
• 2015-2019: Further decline, with Egypt still having the highest number of cases.
• 2020-2023: Minimal cases and deaths, indicating a possible reduction in the spread of the virus in humans during this period.

Additional Notes

• The data is sourced from WHO/GIP (Global Influenza Surveillance and Response System) as of 3 October 2023.
• The cumulative figures are based on the total number of cases and deaths reported over the specified periods.
• The data is not broken down by individual years for the periods 2003-2009, 2010-2014, and 2015-2019, but detailed annual data is available in subsequent tables.