Global Avian Influenza Death Toll and Human Case Counts
The World Health Organization tracks avian influenza death and case data across countries, with the latest cumulative human H5N1 infections reported at over 900 cases globally since 2003, and a fatality rate exceeding 50 percent according to WHO and the Centers for Disease Control and Prevention. The CDC avian influenza overview provides updated situation summaries and risk assessments for H5N1 and other subtypes.
Countries with the highest recorded human H5N1 deaths include Egypt, Indonesia, Vietnam, and Cambodia, with the WHO disease outbreak news page publishing regular updates on confirmed cases and deaths. The WHO global influenza surveillance system aggregates laboratory-confirmed avian influenza death reports from national health authorities and publishes them in its Disease Outbreak News and FluNet databases.
Recent Avian Influenza Deaths and Outbreak Timeline
The most recent human H5N1 death was reported in 2024, with the WHO confirming a fatal case in Cambodia linked to a clade 1.1 variant and the CDC issuing a risk assessment that noted sporadic human infections but sustained person-to-person transmission remains limited. The WHO disease outbreak news page and CDC avian influenza situation updates provide the latest confirmed death and case counts.
In 2024, the United States recorded its first human H5N1 case linked to dairy cattle, with the CDC confirming the infection in a farmworker in Texas and noting that the patient recovered, while the WHO continued to monitor avian influenza death risk in countries with ongoing poultry and dairy outbreaks. The WHO and CDC situation reports track these developments and publish weekly or as-needed updates on human cases, deaths, and viral evolution.
Fatality Rates, Risk Factors, and Prevention Measures
H5N1 avian influenza death rates in confirmed human cases remain above 50 percent, with the WHO noting that risk factors include direct contact with infected poultry, contaminated environments, and, in rare instances, exposure to infected mammals such as dairy cattle. The CDC avian influenza risk assessment and prevention guidance outline recommended personal protective equipment, surveillance, and public health actions.
Prevention strategies focus on controlling outbreaks in poultry, enhancing surveillance at the human-animal interface, and developing candidate vaccine viruses, with the WHO and CDC publishing guidance on antiviral treatment and infection control. The WHO global influenza surveillance and response system and CDC avian influenza resources provide real-time data, risk assessments, and recommendations for countries and clinicians.