Global Notice Global Historical notice
Acute hepatitis of unknown aetiology in children - Multi-country
- Start date
- May 27, 2022
- Last updated
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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
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Dengue - São Tomé and Príncipe
- Start date
- May 26, 2022
- Last updated
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Multi-country monkeypox outbreak in non-endemic countries
- Start date
- May 21, 2022
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Influenza A H1N1 - Germany
- Start date
- May 19, 2022
- Last updated
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Monkeypox - United Kingdom of Great Britain and Northern Ireland
- Start date
- May 18, 2022
- Last updated
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Middle East respiratory syndrome coronavirus – Oman
- Start date
- May 17, 2022
- Last updated
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Monkeypox - United Kingdom of Great Britain and Northern Ireland
- Start date
- May 16, 2022
- Last updated
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Cholera – Cameroon
- Start date
- May 16, 2022
- Last updated
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Lassa fever - Guinea
- Start date
- May 13, 2022
- Last updated
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Middle East respiratory syndrome coronavirus – Qatar
- Start date
- May 12, 2022
- Last updated
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Avian Influenza A(H3N8) - China
- Start date
- May 9, 2022
- Last updated
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Avian Influenza A(H5N1) – United States of America
- Country
- United States
- Start date
- May 6, 2022
- Last updated
Global Notice Global Historical notice
Ebola virus disease - Democratic Republic of the Congo
- Start date
- April 28, 2022
- Last updated
Global Notice Global Historical notice
Japanese Encephalitis - Australia
- Start date
- April 28, 2022
- Last updated
Global Notice Global Historical notice
Measles - Somalia
- Start date
- April 27, 2022
- Last updated
Global Notice Global Historical notice
Multi-country outbreak of Salmonella Typhimurium linked to chocolate products – Europe and the United States of America
- Country
- United States
- Start date
- April 27, 2022
- Last updated
Global Notice Global Historical notice
Cholera – Malawi
- Start date
- April 27, 2022
- Last updated
Global Notice Global Historical notice
Yellow Fever – Uganda
- Start date
- April 25, 2022
- Last updated
Global Notice Global Historical notice
Severe acute hepatitis of unknown origin in children - Multicountry
- Start date
- April 23, 2022
- Last updated
Global Notice Global Historical notice
Acute hepatitis of unknown aetiology – the United Kingdom of Great Britain and Northern Ireland
- Start date
- April 15, 2022
- 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.
