The evaluation of influenza begins with a medical history and physical examination

Physical findings in someone with influenza may include:

• Fever
• Lung congestion
• Rapid breathing rate
• Rapid pulse
• Rash
• Runny nose
• Swollen glands in the neck
• Throat redness

Tests that may be used to evaluate influenza include:

• Chest x-ray
• Complete blood count
• Rapid flu tests:
• Performed on mucus collected from the nose or throat
• Sputum culture
• Viral culture:
• Performed on mucus collected from the nose or throat