Swine flu is a respiratory illness caused by the type A flu (H1N1) virus. The latest outbreaks in countries around the world have been caused by a new version (strain) of the virus.Transmission of this new virus is thought to occur in the same way as seasonal flu. The infection can be effectively treated with antiviral medication. Most reported cases outside of Mexico have been mild and people have recovered fully after treatment.

The Health Protection Agency is monitoring this situation closely. When cases of swine flu are suspected the HPA works with NHS colleagues and patients to collect samples, conduct testing and provide advice on medication and other public health activities.

Further information is available in this section of the website (see ‘Topics menu’ on the right), with specific areas for the general public, healthcare professionals, and the press and media.

Last updated:9 June 2009

Table showing number of new cases and total number of cases.

*New testing arrangements mean that the regional breakdown of figures reflects the regional laboratory where samples are tested which may not always be in the region where the patient lives (as a result there may be some small variations in regional figures as cases are reassigned to their home regions).

504 cases are currently under laboratory investigation in the UK. These cases change on a daily basis on account of some of those under assessment being discounted and new ones being introduced. This figure is correct at the time stated.

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