The Department of Health is delivering the first swine flu information leaflets to households around the UK.
They include guidance on what people should do to protect themselves against the virus, what to do if they think they have the symptoms, and what officials are doing to prepare for it becoming more widespread.
In the UK, 27 people now have the virus, with 23 in England and four in Scotland.
Nine new cases in London and the West Midlands were confirmed on Monday. The Department of Health said seven of them appeared to have been acquired from person-to-person contact, while two were in people who had recently returned from Mexico.
Seven of the recently confirmed cases are in school pupils. Five schools are closed as a result of the outbreak, three in London, one in Gloucestershire and one in Devon.
A spokesman for the Health Protection Agency said: "Those who are still unwell are receiving anti-viral treatment and are recovering at home."
Spain, Portugal and France have also seen new cases of swine flu.
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