Flu cases may signal wider spread

Health Minister Tony Ryall said the situation was changing rapidly and the health sector's response would be altered as the situation evolved.

Health officials are still thinking about whether the pandemic declared yesterday by the World Health Organisation (WHO) means they should order eight million doses of vaccine from Australian manufacturer, CSL Ltd.

"The use of a vaccine is still being considered," Steve Brazier, the Ministry of Health's national incident controller, told NZPA.