Swine flu is a respiratory disease and has some elements of a virus found in pigs. There is no evidence of this disease circulating in pigs in the UK and scientists are investigating its origins.
Swine flu has been confirmed in a number of countries and it is spreading from human to human, which could lead to what is referred to as a pandemic flu outbreak.
Pandemic flu is different from ordinary flu because it's a new flu virus that appears in humans and spreads very quickly from person to person worldwide. The World Health Organization (WHO) is closely monitoring cases of swine flu globally to see whether this virus develops into a pandemic.
Swine flu latest from the NHS details that the government is to start distributing a leaflet on swine flu to all UK households produced by the Department of Health giving information about swine flu, including:
NHS website recommends that the following steps can reduce the risk of catching or spreading flu:
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