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Outbreak notice totals

All-time counts across every WHO Disease Outbreak News bulletin in Public Health Trace.

3,201

Total noticesEvery WHO Disease Outbreak News bulletin

Case total not available

Confirmed casesSum of reported illnesses

131

Countries affected

October 23, 2026

Most recent notice

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Outbreaks reported by month (Year to date)

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Source: WHO public dataLast updated October 25, 2026 ET

Summary (Year to date)

27 outbreaks have been reported year to date.
Sep 2026 was 33% lower than the previous complete period (Aug 2026: 3).
The highest complete period was May 2026 (7).
Oct 2026 is incomplete and not included in the figures above.

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No disease breakdown is available for these filters.

Notices by country

Notices by country
Country	Notices
Democratic Republic of the Congo	7
United States	2
Saudi Arabia	1
Russia	1

Outbreak notices

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 30: Situation (human) in Thailand

Start date: February 27, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Dengue fever in Indonesia

Start date: February 26, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Yellow fever in Liberia

Start date: February 25, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 29: Situation (human) in Viet Nam

Start date: February 23, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 28: Reports of infection in domestic cats (Thailand), Situation (human) in Thailand, Situation (poultry) in Japan and China

Start date: February 20, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 27: Situation (human) in Viet Nam

Start date: February 19, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Recent outbreaks of cholera in Africa

Start date: February 18, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 25: Situation (human) in Viet Nam

Start date: February 17, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 24: Situation (human) in Viet Nam

Start date: February 16, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 23: Situation (human) in Thailand

Start date: February 13, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Nipah-like virus in Bangladesh

Start date: February 12, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 22: First data on patients from Viet Nam, Clinical data from Hong Kong 1997, Susceptibility of H5N1 viruses to antiviral drugs

Start date: February 12, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 21:Global surveillance guidelines, Investigation of possible human-to-human transmission: data on second sister in family cluster in Viet Nam

Start date: February 11, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 20: Overview of the global situation: public health concerns, Situation (human) in Viet Nam

Start date: February 9, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 19: Investigation of possible human-to-human transmission in Viet Nam: new data are reassuring

Start date: February 6, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 18: FAO/OIE/WHO Technical Consultation on the Control of Avian Influenza, Situation (human) in Thailand and Viet Nam

Start date: February 5, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 17: Situation (human) in Thailand and (poultry) in China, Indonesia and Worldwide

Start date: February 4, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 16: Situation in Viet Nam

Start date: February 3, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 15: Additional confirmed human case in Thailand; China announces suspected spread of infection in poultry; investigation of possible human-to-human transmission

Start date: February 2, 2004
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H5N1) - update 14: Two additional human cases of H5N1 infection laboratory confirmed in Viet Nam,Investigation of a family cluster

Start date: February 1, 2004
Last updated: July 21, 2026 ET

Data last updated: October 25, 2026 ET

Outbreak investigations may be ongoing; case counts, hospitalizations, and deaths are updated by CDC as investigations continue. Read the full medical disclaimer.