The cluster of hepatitis A infections linked to some frozen imported berries keeps growing, despite the suspect products being ditched from supermarket shelves.
A range of Foodstuffs' Pam's brand frozen berry products were voluntarily recalled in early October after New Zealand food safety linked the infections to fruit imported from Serbia.
Since the first cases came to light, consumers have been warned to boil all frozen imported berries at 85 degrees for a minute before eating them.
New Zealand Food Safety deputy director-general Vincent Arbuckle warns some Hep A cases have long incubation periods.