It's one of the big questions of the moment - should we all be wearing face masks?

The current advice from the UK government and the World Health Organisation is that face masks should only be worn by those with coronavirus symptoms, as well as health care workers. A review is happening right now to see whether the UK should start urging the public to wear face masks.

Some countries have already changed their guidance - in America, it's recommended people wear cloth face masks when outside their homes. And the Mayor of London Sadiq Khan has called for people to wear non-medical face masks or coverings like scarves or bandanas when travelling. There's also the question of how effective face coverings are in stopping the spread of Covid-19.

ITV News Health Correspondent Emily Morgan and ITV News Science Editor Tom Clarke speak to
Trisha Greenhalgh, professor of primary care health sciences at the University of Oxford, who explains why she thinks we should all start wearing face coverings, which are different to the surgical face masks needed by frontline NHS workers.

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