Here's World Health Organization on the need for – and use of – face masks to combat the coronavirus

A box of face masks purchased at a Home Depot store in Seven Corners, Fairfax, Virginia

There is a global shortage of face masks in the midst of the coronavirus epidemic. Across China, people are wearing various forms of masks to try to minimize the possibility of contracting the new virus.

How should you use masks? And when are they needed? Take a look at this guidance from the World Health Organization.