What we're doing here is just making sure that the Director-General of Health is authorised permanently to be able to make such decisions in terms of additional doses, changing the doses interval, as well as what the target population should be. For the fourth dose, this time there'll be 850,000 people who will be affected, and that's a large population, especially in the winter, when we see a lot of people getting respiratory illness from other viruses, which increases hospital admissions. So having that alongside having COVID-19, which is still in high numbers in New Zealand, just means that we need an extra layer of protection, and having a fourth dose can make all the difference.