This week the Haryana government ordered a mandatory one-week leave for schoolchildren who show signs of the flu. The motivation behind this is the reported spread of the H1N1 strain of the flu, commonly called “swine flu”. Several new cases have been reported in India recently. FamiLife explains what is flu, why swine flu is a concern, how to tell whether someone has the flu, when to go to a doctor and some possible treatments for the flu.