Hon ANDREW LITTLE (Minister of Health): I'll attempt to respond to the member's questions. On the extent of the director-general's approval—and the member, I think, wrapped it up in what discussions or what advice did Ministers have about the background to this. What we were invited to consider was, first of all, the growing international evidence that there is waning immunity—particularly for vulnerable populations—when it comes to COVID vaccines, and, therefore, for those vulnerable populations, should we be considering further assurance, if you like, through more doses of the vaccine to afford greater protection. We considered the advice we received and we took the view that it was appropriate to make a fourth dose available to those populations. We weren't prepared to mandate it, but we thought it should be an option that is available for those who wish to do it. So that is the background to it and what we have approved.