Influenza (Flu)

Influenza, commonly known as the flu, is a contagious respiratory illness caused by influenza viruses. It can affect the nose, throat, and lungs and often develops suddenly, with symptoms ranging from mild to severe. While many people recover within a few weeks, influenza can lead to serious complications, particularly in older adults, young children, pregnant individuals, and those with weakened immune systems.

Common symptoms include fever or chills, cough, sore throat, runny or blocked nose, muscle aches, headaches, fatigue, and general weakness. Some people may also experience nausea, vomiting, or diarrhea. The flu spreads easily through respiratory droplets and close contact, especially during seasonal outbreaks.

Managing influenza typically involves rest, fluids, and symptom relief, while antiviral medication may be recommended in certain cases. Prevention plays an important role, with vaccination being one of the most effective ways to reduce risk. This section explores flu symptoms, causes, treatment options, and signs that indicate medical attention is needed.