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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
Outbreaks by disease

A bar chart of the number of matching outbreaks by disease.

Outbreaks by disease
DiseaseOutbreaks
Shigellosis1
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Outbreaks by disease
DiseaseOutbreaks
Shigellosis1

Outbreak notices

Showing 1–20 of 21 notices

Global Notice Global Historical notice

Shigellosis

Start date
March 14, 2024
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Yellow fever - Guinea

Start date
March 14, 2024
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Yellow fever - Guinea

Start date
March 5, 2024
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Ebola virus disease - Guinea

Start date
February 29, 2024
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Diphtheria-Guinea

Start date
October 18, 2023
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Lassa fever - Guinea

Start date
May 13, 2022
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Marburg virus disease - Guinea

Start date
September 17, 2021
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Marburg virus disease - Guinea

Start date
August 9, 2021
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Ebola virus disease – Guinea

Start date
June 19, 2021
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Yellow fever in Guinea

Start date
June 7, 2021
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

2001 - Yellow fever in Guinea

Start date
June 7, 2021
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

1999 - Meningococcal disease in Guinea-Bissau - Update 2

Start date
June 7, 2021
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

1999- Meningococcal disease in Guinea-Bissau - Update

Start date
June 7, 2021
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

1999 - Meningococcal meningitis in Guinea-Bissau

Start date
June 7, 2021
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Ebola virus disease in Guinea

Start date
June 3, 2021
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Ebola virus disease – Guinea

Start date
March 4, 2021
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Yellow fever – Guinea

Start date
March 4, 2021
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Yellow fever in Guinea

Start date
January 12, 2010
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Yellow fever in Guinea

Start date
November 2, 2005
Last updated

Source: WHO

View Notice

Global Notice Global Historical notice

Yellow fever in Guinea

Start date
August 31, 2005
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.