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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

Country: Canada ×
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Outbreaks reported by month (Year to date)

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Source: WHO public dataLast updated September 5, 2026 ET

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.

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No disease breakdown is available for these filters.

Notices by country

Notices by country
Country	Notices
United States	2

Outbreak notices

Global Notice Global Historical notice

2002 - West Nile virus in Canada - Update 6

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

2002 - West Nile virus in Canada - Update 5

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

2002 - West Nile virus in Canada - Update 3

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

2002 - West Nile virus in Canada

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

2002 - West Nile virus in Canada - Update

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

2002 - West Nile virus in Canada - Update 9

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

2002 - West Nile virus in Canada - Update 7

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

2002 - West Nile virus in Canada - Update 2

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

2002 - West Nile virus in Canada - Update 8

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Outbreak in British Columbia, Canada is not SARS

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

2002 - West Nile virus in Canada - Update 4

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

2000 - Leptospirosis in Canada

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

2000 - E. coli O157 in Canada

Start date: June 7, 2021
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Seoul virus – United States of America and Canada

Country: United States
Start date: February 20, 2017
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Influenza A(H7N9) virus – Canada

Start date: February 1, 2015
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Botulism in the United States and Canada

Country: United States
Start date: October 11, 2006
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Avian influenza A(H7) human infections in Canada

Start date: April 5, 2004
Last updated: July 21, 2026 ET

Data last updated: September 5, 2026 ET

Outbreak investigations may be ongoing; case counts, hospitalizations, and deaths are updated by CDC as investigations continue. Read the full medical disclaimer.