Flu

The flu, or influenza, is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to hospitalization or even death. Here are some key points about the flu:

- Symptoms: Common symptoms include fever, cough, sore throat, runny or stuffy nose, muscle or body aches, headaches, and fatigue. Some people may also experience vomiting and diarrhea, though this is more common in children.

- Prevention: The best way to prevent the flu is by getting vaccinated each year. Other preventive measures include frequent hand washing, avoiding close contact with sick individuals, and covering your mouth and nose when coughing or sneezing.

- Treatment: Antiviral drugs can be used to treat the flu. They are most effective when started within two days of getting sick. Rest, hydration, and over-the-counter medications can also help alleviate symptoms.

- Duration: The flu typically lasts about one to two weeks, with severe symptoms subsiding after a few days, though fatigue and cough can persist longer.

- Complications: Some people, especially those with underlying health conditions, may develop complications such as pneumonia, bronchitis, or sinus infections.

For more detailed information, you can visit trusted health sources like the CDC or WHO websites.