Greg Stevens on GETTR : KN95 masks should not be worn by children, pregnant women or elderly. People with abnormal heart or lung functions should use masks...
KN95 masks should not be worn by children, pregnant women or elderly. People with abnormal heart or lung functions should use masks with caution.
KN95 masks should not be worn by children, pregnant women or elderly. People with abnormal heart or lung functions should use masks with caution.

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