Hon Dr DAVID CLARK (Minister of Health): Traditionally, all contact tracing in New Zealand has been done at a local level by public health units. These units are staffed by highly skilled professionals and they have done a good job. But in the face of COVID-19, it was clear that we needed to ramp up our contact tracing capacity. That led to the establishment of the National Close Contact Service on 24 March, the first time contact tracing has been centralised and conducted at a national level. The national service has more than 200 trained staff and can make 5,000 calls per day, which can be scaled up to 10,000 if required. And that is on top of the excellent ongoing work of our public health units.