Public Health Trace

Get Alerts

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 bulletin

Case total not available

Confirmed casesSum of reported illnesses

131

Countries affected

October 23, 2026

Most recent notice

Download 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.

Filters

Timeline Disease Country Table

Metric

Time range

Group by

View

Outbreaks reported by month (Year to date)

Download CSV

Source: WHO public dataLast updated October 24, 2026 ET

Summary (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.

Notices by country

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

Middle East respiratory syndrome coronavirus (MERS-CoV) – update

Start date: April 10, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Human infection with avian influenza A(H7N9) virus – update

Start date: April 8, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Human infection with avian influenza A(H7N9) virus – update

Start date: April 8, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Ebola virus disease, West Africa – update

Start date: April 7, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Ebola virus disease, West Africa – update

Start date: April 5, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Human infection with avian influenza A(H7N9) virus – update

Start date: April 4, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Ebola virus disease: background and summary

Start date: April 3, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Human infection with avian influenza A(H7N9) virus – update

Start date: April 3, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Ebola virus disease, West Africa – update

Start date: April 2, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Ebola virus disease, West Africa – update

Start date: April 1, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Ebola virus disease in Liberia

Start date: March 30, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Human infection with avian influenza A(H7N9) virus – update

Start date: March 28, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Ebola virus disease in Guinea – update

Start date: March 27, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Middle East respiratory syndrome coronavirus (MERS-CoV) – update

Start date: March 27, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Ebola virus disease in Guinea – update

Start date: March 26, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Middle East respiratory syndrome coronavirus (MERS-CoV) – update

Start date: March 26, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Middle East respiratory syndrome coronavirus (MERS-CoV) – update

Start date: March 25, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Polio outbreak in the Middle East - update

Start date: March 21, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Middle East respiratory syndrome coronavirus (MERS-CoV) – update

Start date: March 20, 2014
Last updated: July 21, 2026 ET

Global Notice Global Historical notice

Human infection with avian influenza A(H7N9) virus – update

Start date: March 20, 2014
Last updated: July 21, 2026 ET

Data last updated: October 24, 2026 ET

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