With Omicron knocking on New Zealand's doorstep, there's concern about how our contact tracing system will cope when it begins spreading in the community.
The system came under severe strain when Delta leaked into the community back in August, which is less transmissible than Omicron.
Dr Andrew Chen is a Research Fellow with Koi Tu - the Centre for Informed Futures at the University of Auckland.
He spoke to Sarah Robson.
