2.59pm: Two people in the Waikato have tested negative for swine flu.

Waikato District Health Board spokeswoman Amy Thomsen said the board is still waiting for a second round of tests that will be carried out in Melbourne and provide more conclusive results.

A third possible case in the Waikato is still being looked into.

Medical officer of health Anita Bell said the person is well.

"Swabs have been taken, and they and their contacts are on Tamiflu and have been advised to stay at home," Bell said.

The results of the swabs will be known in two days time.

Meanwhile all Waikato residents who were on the NZ1 flight returning from North America on Saturday have been contacted and prescribed Tamiflu. They have also been asked to isolate themselves.

2.09pm: The number of people subject to swine flu precautions changed again today as health officials warned that pattern would continue and notifications would become more widespread.

Two more people from the Rangitoto College group which returned from Mexico via Los Angeles on flight NZ1 were confirmed today as having influenza A.

Four of the group have been confirmed as having swine flu, and another eight are likely to return positive test results.

Another person who was on NZ1 but separate from the group also tested positive to influenza A today, as did a separate traveller who has recently been to the United States or Mexico.

Both were considered likely to have contracted swine flu and were being treated as such.

Along with those 14, there were another 31 suspected cases around the country, with 179 more in isolation with symptoms.

Some presented with symptoms on arrival into the country late last night and this morning, with one being taken to hospital and the rest being subject to isolation and treatment.

Meanwhile, Julia Peters, from the Auckland Regional Public Health Service, asked that those who have been affected by swine flu in New Zealand be shown some respect.

"There has been some comment that students have been blamed for bringing this into New Zealand. I think that would be most unfortunate," she said.

"They should not be blamed for that, in fact I think we should be thanking them and their families for cooperating with the advice they were given...

"When they are released from quarantine we need to accept they are not infectious."

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Anyone who has travelled to Mexico or North America in the last seven days should contact Healthline (0800 611 116) for information. They should seek medical advice if they are displaying flu-like symptoms.