Rt Hon JACINDA ARDERN: When we discovered case A, we did not know at what point that person was infected or, indeed, if they were at the beginning of the chain. We've since discovered that Delta was, effectively, in our community for more than a week. Unlike the August outbreak, where we saw potentially an outbreak that had been in the community for possibly three weeks, Delta got a head start that had a far more devastating effect. We've since modelled that we could have had this week upwards of 500 cases a day, had we not locked down. So we went short and sharp while we identified information, and since then identified information that Delta did have a big head start on us and that we needed to be careful.