Influenza spreads between humans through coughing or sneezing but it is restricted to pork products, since the virus is not transmitted through food. Swine flu in humans is most contagious during the first five days of the illness although some people, most commonly children can remain contagious for up to 10 days. The standard infection control, which includes frequent washing of hands with soap and water or with alcohol based hand sanitizers. A new H1N1 starin vaccines are being developed and could be ready as early as June 2009.