Swine flu is the popular name for influenza (flu) caused by a strain of influenza virus A - it may also be called H1N1. Most symptoms are the same as seasonal flu. Symptoms can include cough, fever, sore throat, stuffy or runny nose, body aches, headache, chills and fatigue. The same flu vaccine that protects against seasonal flu also protects against the H1N1 swine flu strain. You can get the vaccine as a shot or as a nasal spray.