Another point about the Pfizer vaccine is that we had a number of good vaccines to choose from, but I'm particularly pleased we chose the Pfizer vaccine. It has shown consistent high efficacy. The other vaccines that we had choices from are also good but some have had to address questions about their efficacy in the elderly. I can reassure seniors in New Zealand that this has performed consistently well. For example, Public Health England reported that, for people over the age of 80, there is an 89 percent vaccine efficacy for the Pfizer vaccine.