Scientists crunching the data on Covid -19 are turning their attention to the next steps in finding cases of the virus and isolating them. There are at least three groups of scientists and economists crunching the numbers, which all point to a turning point that began on Tuesday. Te Pūnaha Matatini is a centre for research excellence, from Auckland and Canterbury Universities, whose latest research was released on Thursday, showing the number of new cases would have exceeded 150 a day by now, without a level four lockdown. Physicist, professor Shaun Hendy, explains what it's going to take to beat the virus.