An infectious disease expert for the United Kingdom said residents should “ideally” wear face masks with three layers to help protect against the coronavirus.
“What we recommend is at least two layers and ideally three layers in a mask. That is really important to reduce the virus transmission both from you to others and others to you,” Susan Hopkins of Public Health England said, the Times reported.
The U.K. made wearing face masks while shopping or in other public settings mandatory in July.
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