How will fancy new antivirals help fight COVID?

When it comes to ways to fight COVID-19, vaccines have been the main tool we've used so far during the pandemic.But new antivirals are being produced for use including in Australia which has recently provisionally approved two different drugs.They promise to help stop at-risk people ending up in hospital and dying.So what are the drugs, how do they work and will they usher in a new way of handling the pandemic?GUEST:Professor Josh Davis, Infectious Diseases, Uni Newcastle, past president of the Australasian Society for Infectious Diseases and member of the National COVID-19 Clinical Evidence Taskforce