Avian Influenza (H5N1)
H5N1 bird flu mainly infects poultry and wild birds, but occasional human infections keep health agencies watching for pandemic risk.
Snapshot: 9/21/2026, 3:30:49 PM · 1 tracked locations · 3,270 active cases (dataset)
At a glance
Quick facts
- How it spreads
- Humans are typically infected through close contact with sick or dead infected birds or highly contaminated environments.
- How serious
- About 4.4 of every 100 confirmed cases died
- Where it's active
- Highest current burden: Vietnam (VN).
- Vaccine / treatment
- Biosecurity on farms, safe handling of sick animals, personal protective equipment for responders, and public guidance to avoid unsafe poultry products reduce risk.
Important
Virus Tracker provides aggregated outbreak monitoring for education and situational awareness. It is not medical advice, a diagnostic service, or a substitute for guidance from qualified health professionals or official public health agencies. Always consult licensed clinicians and authoritative sources for personal health decisions.
Overview
H5N1 viruses cause massive losses in poultry and periodic wild bird die-offs. Human cases remain relatively rare but severe when they occur, driving occupational safety standards for farm and culling workers. Virus Tracker tracks regional human and animal-linked signals where metrics are mirrored in open datasets alongside outbreak narratives.
Transmission
Humans are typically infected through close contact with sick or dead infected birds or highly contaminated environments. Sustained human-to-human transmission is not characteristic of seasonal influenza patterns.
Symptoms & clinical notes
Severe respiratory disease, fever, and systemic complications have been reported. Mild cases may be under-ascertained. Clinical suspicion should trigger appropriate diagnostics and infection control.
Prevention & control
Biosecurity on farms, safe handling of sick animals, personal protective equipment for responders, and public guidance to avoid unsafe poultry products reduce risk. Vaccine strategies differ for animals and humans and follow national policy.
Surveillance context
Animal and human systems must interoperate: veterinary notifications often precede human detections. Genomic tracking informs antigenic updates and risk communication.
Live dataset
Key metrics
Active cases
3.3K
Deaths
820
How fast it's spreading
22.2%
RisingAvian Influenza (H5N1) — global infection heat map
Country shading reflects relative active-case intensity from the current Virus Tracker dataset for this pathogen. Hover countries on desktop for counts.
Darker red = more people currently sick.
Live dataset
Trajectory outlook
Projected case trend with a modeled confidence range.
Projected case trajectory for Avian Influenza (H5N1), with a shaded confidence range, based on the current Virus Tracker dataset.
Illustrative estimateLive dataset
Top regions by active cases
The 1 tracked location with the most active Avian Influenza (H5N1) cases in the current dataset.
Top 1 tracked location for Avian Influenza (H5N1) by active cases, ranked highest to lowest.
Live dataset
Threat intelligence visuals
Threat matrix
How fast vs. how deadly
Each bubble is a threat. Bigger bubbles mean more people are currently sick.
Where this data comes from
11 of 15 sources are reporting normally.
- 11 healthy sourcesHealthy
- 4 sources downDown
- Data reliability
- 41%
- Confidence-adjusted exposure
- 1.3K
Overall threat level
Where it's hitting hardest
- Vietnam3.3K active · score 20.7
Dataset
Top affected regions
| Location | Active | Deaths | Trend |
|---|---|---|---|
| Vietnam (VN) | 3,270 | 820 | Rising |
Frequently asked questions
How do people catch H5N1?
Almost all human cases come from close contact with infected birds, their droppings, or heavily contaminated environments such as poultry farms and live-bird markets.
Can H5N1 spread between people?
Sustained person-to-person spread has not been seen. Occasional close-contact transmission cannot be ruled out, which is why health agencies monitor cases closely.
Is there a vaccine?
Vaccines exist for poultry, and some countries maintain human vaccine stockpiles for pandemic preparedness, but no H5N1 vaccine is in routine public use.
Is this page medical advice?
Virus Tracker provides aggregated outbreak monitoring for education and situational awareness. It is not medical advice, a diagnostic service, or a substitute for guidance from qualified health professionals or official public health agencies. Always consult licensed clinicians and authoritative sources for personal health decisions.
What does "outbreak activity" mean on Virus Tracker?
Outbreak activity reflects active-case burden relative to recoveries in our models. It helps compare stressed outbreak zones within the dataset—it is not a clinical score.
How often is this wiki updated?
Figures refresh on the site’s ingestion and revalidation schedule (typically about every 30 minutes in production). Timestamps on the dashboard snapshot indicate the last build of the underlying dataset.
Why might the heat map not match official government totals?
We merge multiple open sources and fallbacks; reporting lag, testing policy, and geographic coverage differ by country. Use national health ministries for authoritative case definitions.
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