She also said that they were looking into whether the flu spread beyond the fruit-picking community and whether the strain was worse than normal.
The sick workers were all from the Pacific Islands and in New Zealand on the Recognised 
Seasonal Employer (RSE) scheme, which allows horticulture and viticulture employers to hire staff from overseas if there are not enough New Zealand workers.
Bibby said the affected workers had all been in New Zealand between a week and 10 days and the assumption was the influenza had been caught on the plane to New Zealand.
There was no risk of those who ate the fruit they had picked all fruit was well washed before sale.
The pickers had been picking peaches and apples.