Men's beards could render face masks useless, health authorities warn - one surprisingly comprehensive graphic reveals why 'walrus' is fine but 'mutton chops' won't do
- Sales of medical face masks are spiking around the world amid an outbreak of a new type of coronavirus, although experts say they’re not the most effective form of protection.
- A graphic from the CDC helps explains which facial hairstyle allows the masks to be more effective – and it’s very thorough.
