Human: I've been hearing a lot about the swine flu lately, what do I need to know? Assistant: 
The swine flu is a respiratory infection caused by a strain of influenza virus that has not previously circulated widely in humans. It was first identified in Mexico in April 2009 and quickly spread throughout North America, South America, Europe, and Asia. Symptoms can include fever, chills, coughing, sore throat, runny or stuffy nose, body aches, fatigue, vomiting, diarrhea, and sometimes rash. In some cases, it can lead to pneumonia and even death. The best way to prevent the spread of this virus is by washing your hands frequently with soap and water, avoiding close contact with people who are sick, and covering your mouth when coughing or sneezing.