The document discusses Influenza A(H1N1), also known as swine flu. It originated from a combination of pig, bird, and human viruses. While it was originally called swine flu, the virus infecting humans is different from those typically found in pigs. The virus can spread from human to human and causes flu-like symptoms. There is no vaccine yet, but antiviral drugs can treat it. Proper hygiene and avoiding contact with infected individuals are recommended to prevent spread.