All year 12 students at Auckland's Westlake Girls High School have been told to stay home from school for a week following a spread of confirmed cases of swine flu.
The number of swine flu cases has risen from 43 to 71 in the last 24 hours, but Health Minister
Tony Ryall says there is no reason for alarm, and that more cases are to be expected.
"We are working to contain the spread as much as possible. This is a rapidly changing situation with cases increasing exponentially both here and many states in Australia."
Included are the first cases confirmed in the Bay of Plenty and Lakes District Health Board region; a 15-month-old American boy holidaying with his family and a Tauranga teenager.
Both went to medical centres while displaying symptoms, the Tauranga teen to her GP and the toddler to the Taupo Hospital emergency department (ED).
Medical Officer of Health Phil Shoemack said the boy's family had been in New Zealand for five days when he became ill.
"The family was tracked down at a relative's place in Wellington, and the public health follow-up work is being carried out by Hutt Valley staff," he said.
"The American family and relatives the family is staying with has been asked to stay put in the household and await further instructions from the public health staff."
The teenager's flatmates, colleagues and other close contacts were being contacted.
Dr Shoemack said he was not sure if the teenager or the toddler's family had phoned before visiting the GP and ED respectively but reiterated the need for people to do so.
"If you suspect you or your family member has influenza ... we'd prefer that you didn't go to an ED of a hospital," he told NZPA.
"What we're trying to do is get people, as much as possible, to get in contact by telephone first, so that they can get appropriate instructions."
People would either be told what action to take at home or, if a visit was deemed necessary, a specific time would be made and they would be directed to a certain door rather than having them in the waiting room.
"Emergency departments are always busy, especially through winter, and we're not wanting people with infectious disease to turn up unannounced, because it just heightens the likelihood that they might pass their bugs on, whatever it is they've got."
However, people were not expected to self-diagnose. For children, in particular, the symptoms of the flu were similar to that of meningitis.
The Ministry of Health advised that people who had travelled overseas but were well did not need to be routinely excluded from school or work. However, if they have flu symptoms within seven days they should call their doctor or Healthline (0800 611 116), and not go to school or work.
It was not necessary to cancel or postpone overseas travel, it advised.
"In most cases, people with influenza can safely recover at home and will not need to see their GP or emergency clinic.
"However, people should seek medical advice when necessary, especially if their condition worsens. Seeking medical advice is particularly important for people with underlying medical problems who are at higher risk of complications from influenza."
Other new cases include:
* A 69-year-old woman in the Nelson area who travelled from Australia;
* A 33-year-old man in Wellington, who had not recently travelled or been in touch with anyone who had;
* Five preschoolers from Tino E Tasi Preschool in Christchurch;
* A 40-year-old woman with other cases who is in contact with the preschool cases; and
* A 13-month-old boy who attends an ABC preschool in Auckland.
- ADDITIONAL REPORTING: NZPA
Westlake Girls is the latest education provider taking steps to counteract the spread of swine flu. Photo / Herald file
All year 12 students at Auckland's Westlake Girls High School have been told to stay home from school for a week following a spread of confirmed cases of swine flu.
The number of swine flu cases has risen from 43 to 71 in the last 24 hours, but Health Minister
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