The new swine flu virus is highly contagious, that is it spreads from person to person. The virus is spread through the droplets that come out of the nose or mouth when someone coughs or sneezes. If someone coughs or sneezes and they do not cover it, those droplets can spread about one metre (3ft). If you are very nearby you might breathe them in.
Or, if someone coughs or sneezes into their hand, those droplets and the virus within them are easily transferred to surfaces that the person touches, such as door handles, hand rails, telephones and keyboards. If you touch these surfaces and touch your face, the virus can enter your system, and you can become infected.