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Should we follow revised WHO advice on face masks - and could it cost us more to cover up?

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Guidance to the general public on the wearing of face masks or coverings to reduce the risk of Covid-19 transmission has become more complicated - and potentially more expensive for some groups.

The World Health Organisation (WHO) in recent days changed its advice on face masks, saying they should be worn in public where physical distancing may not be possible to help stop the spread of the virus.

Each country makes its own rules so how does it sit with advice from chief medical officer Dr Tony Holohan and his team?