Scott Morrison has backed Gladys Berejiklian's decision not to lock down Sydney. The Prime Minister said the premier was 'taking the right approach' to adopt proportionate restrictions as an outbreak of the Indian Delta variant rose to 36 on Wednesday with more cases expected on Thursday. University of Melbourne epidemiologist Professor Tony Blakely said Ms Berejiklian was 'crazy' for keeping gyms open and warned lockdown will last longer for every moment she delays imposing it. But Mr Morrison supported his Liberal colleague. 'The premier and I spoke at some length yesterday and I have been keeping in contact over the course of this last week with the situation in NSW,' Mr Morrison told Sunrise.