People are being asked to wear 'three-layer' coverings where they cannot socially distance.
However, despite Mr Gething's comments about shops, advice from the Welsh Government's Technical Advisory Cell said busy retailers were one setting where face coverings should be worn.
The group, which provides scientific advice to ministers, said coverings"might" reduce transmission if"made, worn, handled and cleaned or disposed of properly"."A face covering principally acts to protect others by retarding the transmission of small droplets containing viral particles into the environment. Well-fitted medical face masks serve to protect the wearer from infection and others from transmission if the wearer is infectious.
An expert who helped lead Hong Kong's investigation into Sars said wearing masks was a sensible way of controlling the spread of the coronavirus.
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