Double masks: Should we use them?

There’s a lot of choice about which type of face covering to wear – and in some countries the advice is changing as we learn more about how the virus spreads.

In certain countries a specific type of mask is required in public areas.

The BBC's Science Editor David Shukman explains the differences between cloth masks, surgical masks and N95 masks - and looks at whether we should double mask.

Produced by: Bella McShane, Ameer Ahmed and Parveen Virdi.