Health officials are suggesting that anyone feeling unwell should stay away from the All Black clash against France in Wellington on Saturday.
The second All Black test against France could draw a crowd of up to 34,500.
To stop the spread of the virus, the region's public health officials are asking any fans who think they are ill to "share their tickets and not their virus".
Dr Margot McLean from Wellington Regional Public Health says extra hand washing facilities will be set up for those attending the game.
She says it is up to those who are feeling unwell to take responsibility and avoid mingling in large crowds.
