Hon CHRIS HIPKINS: Ultimately, the targets, or the performance measures, if you like, measure risk, and the more we can achieve the performance measures specified, the lower we can make the risk. Having said that, if we don't find out about a case for a prolonged period of time, or if people don't share information about their close contacts in a timely way with us, then the contact tracers won't be able to reach those performance measures. Sometimes people do forget who they've been in contact with, and it's only after some time that they may remember them.