What Is Flu?
Flu is a respiratory infection caused by a number of viruses. Flu viruses pass through the air and enter your body through your nose or mouth. Flu can be serious or even deadly for elderly people, newborn babies and people with certain chronic illnesses.
Symptoms of Flu
Symptoms of flu may include:
- Headache
- Cough
- Sore throat
- Fever
- Body or muscle aches
- Chills






