Auckland's Legionnaire's disease outbreak continues to spread.
Three new cases were notified over the weekend, bringing the total over the past nine weeks to 15, with one death.
The average is usually between zero and one case for a typical month.
Auckland Council is working with building owners to ensure no cooling tower in the region is able to harbour harmful legionella bacteria.
Spokesman Ian McCormick said it was not yet known if the cases are linked.