Rt Hon JACINDA ARDERN: Yes, and some of those tools are the ones that you're seeing so widely in use now. Public health units have the ability, for instance, for even the management of flu to shut down some health facilities, if they need to. For the measles, they use contact tracing alongside other tools. But I guess the point that I would again make, referring back to the last member's question, is a number of health professionals have been talking about the extra capacity the vaccine gives you to change the way that you deal with outbreaks, as have we.