A Canadian woman is being treated for suspected swine flu in the UK.
NHS North West, a regional strategic health authority, said the woman is being treated at an undisclosed hospital in Manchester.
She is believed to have been visiting friends in Sale, an area of south Manchester. It is not known if she visited Mexico recently.
An NHS North West spokeswoman said: “We are aware that an overseas visitor to the Sale area is being tested for possible swine flu.
“The person concerned has been taken to hospital for further tests, in keeping with recommendations, and purely as a precaution.
“More information will be released as soon as possible.”