The government is stockpiling antivirals and ordering vaccine
Another case of swine flu has been confirmed in Northern Ireland.
A man who recently returned from America has been diagnosed with the virus. He has been given drugs and is said to be recovering well.
It brings the total number of cases in Northern Ireland to 25; sixteen other cases are being investigated.
On Thursday, it emerged that a man in Northern Ireland had been hospitalised with swine flu. He is being treated in the Ulster Hospital, Dundonald.
People who have been in close contact with the man are being given anti-viral drugs. He had recently come home after travelling in England and Scotland.
The Northern Ireland swine flu helpline number is 0800 0514 142.