Another three potential cases are considered "probable" although health officials are reassuring Tasmanians there is no need to panic over the outbreak.

A Northern Tasmanian woman was diagnosed with swine flu on Friday, followed by a Northern Tasmanian man yesterday, acting Chief Health Officer Dr David Boadle said.

Dr Boadle said the man and woman had both recently travelled to Melbourne, but officials had no evidence that a particular flight into Launceston during the week could have brought the virus to the North.

Yesterday a 42-year-old Launceston woman, who was in isolation and awaiting test results, said she believed she could have been exposed to the virus on a flight from Melbourne into Launceston on Tuesday.

The woman said she had waited three days for her test results - which she had been assured would arrive within 24 hours. She was notified last night that she had not tested positive for swine flu.

Dr Boadle said the testing was being done as quickly as possible.

"We'd hope to have most people's results from late last week by today," Dr Boadle said.

"Some people will get them today and some of them will get them tomorrow - it really depends on which run of the laboratory their specimen hit on Saturday."

Six of the confirmed Tasmanian cases are in the North-West and one in the South.

Nationally, the number of people infected has passed the 1000 mark.

Dr Boadle said there was no need for the public to panic over swine flu.

"We're not overly concerned in Tasmania because importantly there is no evidence of community- based transmission in Tasmania, which is the most important thing," he said.

"So we're just watching it very carefully to see what happens in the next one or two weeks."

The State Government will have five regional flu clinics set up and operating by tomorrow and Dr Boadle said they would compliment other measures to limit the spread of the virus.

"We don't expect a huge demand from people and in fact we don't want huge numbers of people turning up at the flu clinics in the first instance because the vast majority of people in Tasmania with those symptoms - cough, fever, runny nose - have seasonal flu or a cold," Dr Boadle said.

• Anyone with flu-like symptoms who has returned from Victoria, Mexico, the US or Canada within the past week, or anyone who has been in contact with someone suspected of having swine flu, should call the FLU DOC hotline on 1800 358 362.