I want to talk about the Delta variant briefly, and I did notice Dr Reti's sleight of hand with the science during question time. Yes, Delta emerged some time ago—in fact, in October last year—and surged in India in May of this year. But our understanding of the parameters of the virus that provide actionable public health intelligence has only come to light recently. Parameters like the incubation period that informs contact tracing systems, only published in June—late June, the last week of June. And you would have seen the impact that had on the series of advice that we had from Professor Skegg's group. The implication that hospital preparedness should have been changed, when it was only last week that we had information published in the Lancet that the rate of hospitalisations was doubled with the Delta outbreak.