The number of new coronavirus cases in Melbourne has finally hit a high enough level for the Victorian Government to put the city back into lockdown. Melbourne will be in lockdown for the next six weeks, or 42 days, with people only being allowed out for four specific reasons: care, essential purchases, exercise and school or work. It's a remarkable turnaround from only a month ago, where elimination and international travel bubbles were on the agenda. So why put the lockdowns in now? Will they work? And why is it going to be so much harder the second time around?