Influenza

Updated 2026-10-14

respiratory

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Source-backed reference: Influenza

Plain-English overview

Seasonal influenza surveillance tracks clinic visits, lab positivity, hospitalizations, and sometimes wastewater RNA in countries that publish it.

What official signals usually mean here

Signals are weekly bulletins or press releases from CDC, ECDC, WHO, or ministries summarizing what their own networks measured.

How OutbreakThreat tracks it

We surface the headline and link; week-over-week comparisons belong on the agency chart you open from the citation.

Official references

Below, “Latest signals” pulls from our index only when a publisher URL is attached. Open each alert for the full notice. How we label sources.

Current outbreak signals

Each notice shows the publisher's event date and source. Geography is whatever that notice stated. Counts on this page are the number of ingested notices, not national case totals. Map: filtered map.

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Use the OutbreakThreat map to explore related disease signals, official sources, and nearby alerts.

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End of the 2026 influenza season - Influenza - South Africa NICD - event 2026-10-21
Seasonal influenza - Global situation - Influenza - World Health Organization - event 2025-12-10
Influenza A(H1N1) variant virus - Viet Nam - Influenza - World Health Organization - event 2024-09-04
Influenza A(H1N1) variant virus - Spain - Influenza - World Health Organization - event 2024-02-09
Influenza A (H1N1) variant virus - Influenza - World Health Organization - event 2024-02-07
Influenza A(H1N2) variant virus infection - United Kingdom of Great Britain and Northern Ireland - Influenza - World Health Organization - event 2023-12-01
Influenza A (H1N1) variant virus - the Netherlands - Influenza - World Health Organization - event 2023-09-13
Influenza A (H1N2) variant virus-United States of America - Influenza - World Health Organization - event 2023-08-11
Influenza A H1N1 variant virus - Brazil - Influenza - World Health Organization - event 2023-06-16

View all Influenza alerts

What it is

Respiratory illnesses affect the lungs and airways. Public dashboards and wastewater can show when activity is rising in a community.

Symptoms (general)

Symptoms vary by illness but may include cough, fever, sore throat, fatigue, or shortness of breath. This page is informational only.

How it spreads

Many respiratory pathogens spread through respiratory droplets and aerosols, especially in crowded indoor spaces.

Prevention (general)

Follow local public health guidance, stay home when ill, improve ventilation where possible, and consult a clinician for personal medical decisions.

Related locations

Email when new Influenza notices match a saved place

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