The flu (influenza) usually lasts about 3 to 7 days for most people. The most severe symptoms tend to last about 2 to 3 days, followed by some lingering symptoms such as a dry cough, fatigue, and weakness. While most recover within one to two weeks, it is common to still feel weak or tired during this recovery period. Symptoms typically start suddenly, 1 to 4 days after exposure to the virus. In some cases, especially people with weakened immune systems or underlying conditions, symptoms and contagiousness may last longer. People are most contagious in the initial 3 to 5 days of illness. If symptoms persist beyond a week or worsen, it is advised to see a doctor as this may indicate complications or another health issue. Generally, rest, hydration, and symptom relief medications are recommended to support recovery. In summary:
- Flu symptoms usually last 3 to 7 days.
- Severe symptoms last 2 to 3 days.
- Full recovery typically happens within 1 to 2 weeks.
- Some symptoms like cough may linger longer.
- Contagiousness is highest in the first 3 to 5 days after symptoms begin.
