Global Notice Global Historical notice
Influenza A(H1N1) - update 30
- Start date
- May 16, 2009
- Last updated
Data Explorer
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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 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
Influenza A(H1N1) - update 29
- Start date
- May 15, 2009
- Last updated
Global Notice Global Historical notice
Avian influenza - situation in Egypt - update 15
- Start date
- May 15, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 28
- Start date
- May 14, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 27
- Start date
- May 13, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 26
- Start date
- May 12, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 25
- Start date
- May 11, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 24
- Start date
- May 10, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 23
- Start date
- May 9, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 22
- Start date
- May 8, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 20
- Start date
- May 7, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 18
- Start date
- May 6, 2009
- Last updated
Global Notice Global Historical notice
Yellow fever in Liberia
- Start date
- May 6, 2009
- Last updated
Global Notice Global Historical notice
Avian influenza - situation in Egypt - update 14
- Start date
- May 6, 2009
- Last updated
Global Notice Global Historical notice
Avian influenza – situation in Viet Nam - update 6
- Start date
- May 6, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 16
- Start date
- May 5, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 14
- Start date
- May 4, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 12
- Start date
- May 3, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 10
- Start date
- May 2, 2009
- Last updated
Global Notice Global Historical notice
Influenza A(H1N1) - update 8.1
- Start date
- May 1, 2009
- 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.
