Hon Dr DAVID CLARK: The expectations are really clear, but I will say there's no evidence to date of any person coming out of managed isolation who has gone on to spread the virus into the community. The 14-day rule is done so, because it is effective. The rationale for it is based on the incubation period of the disease. It's the time from exposure to development of symptoms, considered to be in the range of one to 14 days, but most commonly three to seven days, and, as such, that—