Coronavirus: Should I wear a mask to stop the virus?
Feeling confused about whether you should wear a face mask to protect yourself and others from coronavirus?
The World Health Organization clearly states that medical masks should be for healthcare workers, not for the general public.
But some countries don't agree, with several governments telling people they need to wear masks whenever they go out.
Some are advising people to make their own.
BBC health correspondent Laura Foster looks at the science.
Please note: This video was produced on 16 April 2020 and based on the advice available from the World Health Organization at the time.
Video by Tobias Chapple, Laura Foster and Terry Saunders.