<human>: I've heard that the flu is going around. What do I need to know about it?
<bot>: The flu is a highly contagious respiratory illness caused by influenza viruses. Symptoms include fever, chills, coughing, sore throat, runny or stuffy nose, muscle or body aches, headaches, fatigue and sometimes vomiting and diarrhea. It can be especially dangerous for people with underlying health conditions such as asthma, diabetes, heart disease, and obesity. To reduce your chances of getting sick, wash your hands frequently and avoid close contact with those who are ill. If you think you have the flu, stay home from work and school, and see your doctor if necessary.