Global Notice Global Historical notice
Pandemic (H1N1) 2009 - update 90
- Start date
- June 4, 2021
- 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.
3,200
Total noticesEvery WHO Disease Outbreak News bulletinCase total not available
Confirmed casesSum of reported illnesses131
Countries affectedOctober 15, 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 | 6 |
| United States | 2 |
| Saudi Arabia | 1 |
| Russia | 1 |
Outbreak notices
Global Notice Global Historical notice
Influenza A(H1N1) - update 41
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 47
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 43
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Pandemic (H1N1) 2009 - update 75
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Pandemic (H1N1) 2009 - update 60
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 44
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Pandemic (H1N1) 2009 - update 68
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Avian influenza - situation in Egypt - update 57
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Pandemic (H1N1) 2009 - update 67
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Pandemic (H1N1) 2009 - update 73
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Pandemic (H1N1) 2009 - update 108
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Pandemic (H1N1) 2009 - update 111
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 52
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Pandemic (H1N1) 2009 - update 93
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Influenza updates
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Pandemic (H1N1) 2009 - update 80
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Pandemic (H1N1) 2009 - update 66
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 45
- Start date
- June 4, 2021
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 55
- Start date
- June 4, 2021
- 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.
