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The more layers of the mask, the better the antiviral effect? If it is not worn correctly, it will reduce the effect of protection. | #3

The more layers of the mask, the better the antiviral effect? If it is not worn correctly, it will reduce the effect of

The more layers of the mask, the better the antiviral effect? If it is not worn correctly, it will reduce the effect of

The more layers of the mask, the better the antiviral effect? If it is not worn correctly, it will reduce the effect of protection.