CHRIS BISHOP (National): Thank you, Mr Chair, and thank you for that illuminating answer. I want to turn to the issue of vaccine supply and ask a couple of particular questions. The first is, a prefatory remark, we've been told for most of the year that it's very, very difficult to get earlier delivery than what we have of the Pfizer vaccine. Every attempt that's been made by us and other commentators to encourage the Government to get speedier delivery we've been told that that's impossible, that the Pfizer delivery time lines are what they are and there's nothing we can do about that. That's been contested, but I don't want to ask about that because we've been back and forth about that in the House.