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Data Explorer

Research historical outbreak investigations and the full recall archive, with charts, trends, and advanced filters. Looking for what's happening right now instead? See current Health Alerts.

Outbreak notice totals

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

3,195
Total noticesEvery WHO Disease Outbreak News bulletin
Case total not available
Confirmed casesSum of reported illnesses
131
Countries affected
August 28, 2026
Most recent notice

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Outbreaks reported by month (Year to date)

A chart of outbreaks grouped by month.

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Source: WHO public dataLast updated

Summary (Year to date)

  • 25 outbreaks have been reported year to date.
  • Aug 2026 was 0% higher than the previous complete period (Jul 2026: 3).
  • The highest complete period was May 2026 (7).
  • Sep 2026 is incomplete and not included in the figures above.
  • Complete data
  • Incomplete

No disease breakdown is available for these filters.

Notices by country

A bar chart of the number of matching notices by country.

Notices by country
CountryNotices
Democratic Republic of the Congo3
United States3
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Outbreak notices

Showing 41–60 of 3,195 notices

Global Notice Global Historical notice

Avian Influenza A(H5N1) - Cambodia

Start date
July 5, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Anthrax – Thailand

Start date
May 29, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

COVID-19 - Global Situation

Start date
May 28, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Circulating vaccine-derived poliovirus type 2 (cVDPV2) - Papua New Guinea

Start date
May 20, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Yellow fever - Region of the Americas

Start date
May 16, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Measles - Morocco

Start date
May 13, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Chikungunya - La Réunion and Mayotte

Start date
May 12, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Middle East respiratory syndrome coronavirus - Kingdom of Saudi Arabia

Start date
May 12, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Measles – Region of the Americas

Start date
April 28, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Sudan virus disease – Uganda

Start date
April 26, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Avian Influenza A(H5N1) - Mexico

Start date
April 17, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Invasive meningococcal disease - Kingdom of Saudi Arabia

Start date
April 11, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Cholera - Angola

Start date
March 28, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Measles - United States of America

Country
United States
Start date
March 27, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Marburg virus disease– United Republic of Tanzania

Start date
March 13, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Middle East respiratory syndrome coronavirus - Kingdom of Saudi Arabia

Start date
March 13, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Sudan virus disease – Uganda

Start date
March 8, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Cluster of community deaths in Basankusu, Equateur- Democratic Republic of the Congo

Start date
March 3, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Sudan virus disease - Uganda

Start date
February 21, 2025
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Marburg Virus Disease–United Republic of Tanzania

Start date
February 14, 2025
Last updated

Source: WHO

View Notice

Data last updated:

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