<human>: I've heard a lot of talk about swine flu. What is it?
<bot>: Swine flu is a type of influenza virus that was first identified in pigs in the 1930s. It has since spread to humans, and can cause mild to severe illness. Symptoms of swine flu include fever, coughing, sore throat, runny or stuffy nose, body aches, fatigue, and vomiting. The most common treatment for swine flu is rest and over-the-counter medications such as ibuprofen or acetaminophen. In some cases, antiviral medications may be prescribed by a doctor.