Canterbury medical officer of health Dr Alistair Humphrey said Christchurch and Queenstown airports had systems in place to detect passengers with suspected influenza.
Any passengers showing flu symptoms were tested and quarantined until results were confirmed, he said.
Despite this, it was inevitable those yet to show symptoms would slip through border controls, especially with the influx of Australian skiers, Humphrey said.
http://www.stuff.co.nz/national/health/2474431/Aussie-skiers-pose-risk-of-infection
