Last Updated on August 19, 2026
Introduction
- A subtype of the
influenza A virus
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Influenza viruses are divided into influenza A, B, C, and D. Influenza A is the most common type.
- 2009 pandemic
- High risk groups:
- Immunocompromised / chronic illness
- Pregnant women
- Children >5 years old
Clinical Features
Symptoms
- Fever
- Diarrhoea
- Vomiting
- Cough
- Sore throat
- Rhinitis
- Headache, myalgia, lethargy
Investigation
- Influenza PCR