Avian influenza

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Avian influenza

ORPHA:454836Disease

What it is

A rare, infectious disease characterized by variable severity and outcome, ranging from mild upper respiratory tract infection with fever and cough, to influenza-like illness with rapid progression to severe pneumonia, sepsis with shock, acute respiratory distress syndrome and even death. Additional manifestations may include conjunctivitis, nausea, abdominal pain, diarrhea, vomiting, multiple organ dysfunction, and encephalopathy.

Key facts

Prevalence
<1 / 1 000 000 (Europe)
Age of onset
All ages
Inheritance
Not applicable
Classified as
Disease

Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.

Signs and symptoms

These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.

ICD-10 codes

J09filed under a broader ICD-10 category

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references

MEDDRA 10064097MESH D005585MONDO 0018695UMLS C0016627

Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.

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