The scientific race to understand Covid-19
In the five months since the world learned about Covid-19, it has killed hundreds of thousands of people. In that time, what have scientists found out – and what do they still not know?
This episode first aired on Today in Focus, the Guardian’s global daily news podcast made by the Guardian team in London.
Coronaviruses have been causing problems for humanity for a long time. Several versions are known to trigger common colds and more recently two types have set off outbreaks of deadly illnesses: severe acute respiratory syndrome (Sars) and Middle East respiratory syndrome (Mers).