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Masks with valves and face shields ineffective, allow spread of coronavirus: Study

2020-09-04T13:17:02+00:00

Get Premium High-quality Cloth Mask here! WASHINGTON (AFP) - People wearing plastic face shields or masks fitted with a valve

Masks with valves and face shields ineffective, allow spread of coronavirus: Study2020-09-04T13:17:02+00:00
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