Hon CHRIS HIPKINS (Minister of Health): Yes, but as I've said before in the House recently, the COVID Tracer app is just one of the tools that's available to us. The work and expertise of the public health units and the National Close Contact Service remain the mainstays of our contact tracing system, and I have confidence in the effectiveness of their work. In regard to the second part of the question, the COVID Tracer app helps people to record where they've been and can be used to notify potential contacts of exposure to COVID-19. Public health units do not specifically record how they've identified the close contacts across all 2,446 cases, but I've been advised that the app is being used to help find the up-to-date contact details for close contact follow-up. It is in the case investigators' operating procedure to request the digital diary of a case, where they have one. 