How could we let an aged care outbreak happen again?

The second wave in Victoria in 2020 revealed aged care to be a major vulnerability in Australia's handling of the coronavirus pandemic. Of the many hundreds of deaths from the second wave, the majority were in private aged care homes. And, sadly, COVID-19 has once again made it back into aged care - with coronavirus currently in two facilities in Melbourne. So on today's Coronacast, wasn't aged care supposed to be protected by now? Also on today's show: * When does a cluster become a wave? * What research has been done on shortening the gap between 1st and 2nd doses? * Why can't we just vaccinate people on day 1 of hotel quarantine?