Flu-like illness

What is flu-like illness?

Illness with fever and cough, most often caused by influenza (flu) viruses. In cooler countries flu comes mostly in winter; in tropical places it can strike all year.

Signs

Sudden fever, dry cough, headache, aching muscles and joints, feeling very tired, sore throat and runny nose. Most people feel better in about a week.

How it spreads

Through coughs and sneezes, and hands that carry the virus. It spreads fast in crowded places like schools and care homes.

How to protect yourself

A flu vaccine every year is the best protection. Wash hands, cover coughs and sneezes, stay home when ill, and keep away from sick people.

Get medical help

Seek medical care if symptoms are severe or getting worse, or if you are pregnant, under 5, over 65, or have a long-term illness. Flu can lead to pneumonia.

In Dooram's words, from the World Health Organization. Source: WHO fact sheet: Influenza (seasonal), read 8 October 2026. General information, not medical advice.