Virus wiki
Influenza
Seasonal influenza viruses cause recurrent epidemics; zoonotic influenza subtypes remain under global watch for pandemic potential.
Snapshot: 5/10/2026, 10:57:16 AM · 1 tracked locations · 29,256 active cases (dataset)
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
Influenza A and B drive winter burdens in temperate zones and more complex seasonality in tropics. Vaccination composition updates follow antigenic drift surveillance. Virus Tracker visualizes regional pressure proxies where open metrics align with syndromic or laboratory reporting.
Transmission
Droplets and aerosols; high-transmission settings include schools, long-term care facilities, and mass transit during peaks.
Symptoms & clinical notes
Fever, cough, myalgia, and malaise; complications include pneumonia especially in elderly and high-risk groups.
Prevention & control
Annual vaccines, antiviral treatment per guidelines, respiratory etiquette, and workplace sick leave policies.
Surveillance context
Sentinel clinics, lab networks, and global sharing platforms inform vaccine strain selection.
Key metrics
Active cases (dataset)
29,256
Reported deaths
2,501
Pressure index
8.91%
Influenza — 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.
Trajectory outlook
Trajectory (14d)
Regional analysis
Top regions by active cases
Top 1 tracked locations for Influenza by active cases in the current dataset.
Threat intelligence visuals
Threat Matrix
Pressure (x) vs CFR (y) with bubble size by active cases
Source Reliability
Healthy sources
4
Unhealthy sources
3
Average confidence
40.0%
Confidence exposure
11,702
Health ratio
Severity by Region
Top affected regions
| Location | Active | Deaths |
|---|---|---|
| Japan (JP) | 29,256 | 2,501 |
FAQ
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 the pressure index mean on Virus Tracker?
Pressure index 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.