Catching COVID-19 again

The world has recorded its first official COVID-19 reinfection case.  At first glance, it looks like immunity to the virus may not last that long. But before you rush to conclusions, it's worth taking a closer look. Today, we're addressing one of the most worrying theories about this illness, and its implications for humanity's struggle against it. Featured: Professor Catherine Bennett, Chair of Epidemiology, Deakin University