Steroid drug major Coronavirus treatment breakthough

Dexamethasone has been found to cut the risk of dying from Coronavirus among seriously ill patients by up to a third. Dr Jennifer Rohn (UCL Medical Sciences) explains how the drug works and why the discovery of its effectiveness in treating the disease is so important.

Watch: BBC News (from 36 mins 59 secs), Listen: BBC World Service’s ‘Science in Action’ (from 2 mins 57 secs)