Swine flu is a type of viral infection. It's called swine flu because it resembles a respiratory infection that pigs can get. This is the first detection of this particular strain of swine flu - called A(H1N2)v - in a human in the UK.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/swine-flu-in-the-uk-what-are-the-symptoms-of-the-new-strain