Global Notice Global Historical notice
Confirmed international spread of wild poliovirus from Pakistan
- Start date
- September 20, 2011
- Last updated
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.
3,201
Total noticesEvery WHO Disease Outbreak News bulletinCase total not available
Confirmed casesSum of reported illnesses131
Countries affectedOctober 23, 2026
Most recent noticeDownload matching outbreaks as CSV
CSV exports include up to 5,000 matching rows (applying your current filters), not the full dataset if it's larger.
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A chart of outbreaks grouped by month.
Download CSVSummary (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.
- Complete data
- Incomplete
No disease breakdown is available for these filters.
A bar chart of the number of matching 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
Wild poliovirus confirmed in China
- Start date
- September 1, 2011
- Last updated
Global Notice Global Historical notice
Avian influenza – situation in Cambodia - update 6
- Start date
- August 19, 2011
- Last updated
Global Notice Global Historical notice
West Nile Virus Infection (WNV) in Europe
- Start date
- August 16, 2011
- Last updated
Global Notice Global Historical notice
Outbreak of illness in schools in Angola
- Start date
- August 15, 2011
- Last updated
Global Notice Global Historical notice
Avian influenza - situation in Egypt - update 55
- Start date
- August 9, 2011
- Last updated
Global Notice Global Historical notice
Avian influenza – situation in Cambodia - update 5
- Start date
- August 2, 2011
- Last updated
Global Notice Global Historical notice
Cholera outbreaks in the Democratic Republic of Congo (DRC) and the Republic of Congo
- Start date
- July 22, 2011
- Last updated
Global Notice Global Historical notice
Poliomyelitis in Pakistan
- Start date
- July 7, 2011
- Last updated
Global Notice Global Historical notice
Avian influenza - situation in Egypt - update 54
- Start date
- June 22, 2011
- Last updated
Global Notice Global Historical notice
Avian influenza - situation in Egypt - update 53
- Start date
- June 16, 2011
- Last updated
Global Notice Global Historical notice
Poliomyelitis in Chad
- Start date
- June 10, 2011
- Last updated
Global Notice Global Historical notice
Avian influenza – situation in Indonesia - update 5
- Start date
- June 3, 2011
- Last updated
Global Notice Global Historical notice
EHEC outbreak: Increase in cases in Germany
- Start date
- June 2, 2011
- Last updated
Global Notice Global Historical notice
Avian influenza - situation in Egypt - update 52
- Start date
- June 1, 2011
- Last updated
Global Notice Global Historical notice
Outbreak of haemolytic uraemic syndrome in Germany
- Start date
- May 27, 2011
- Last updated
Global Notice Global Historical notice
Ebola in Uganda
- Start date
- May 18, 2011
- Last updated
Global Notice Global Historical notice
Avian influenza – situation in Indonesia - update 4
- Start date
- May 13, 2011
- Last updated
Global Notice Global Historical notice
Avian influenza – situation in Cambodia - update 3
- Start date
- April 21, 2011
- Last updated
Global Notice Global Historical notice
Wild poliovirus in Côte d'Ivoire
- Start date
- April 21, 2011
- Last updated
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.
