“Since we do not yet have evidence that face shields are as effective as source control or protection from respiratory droplets as masks, we recommend that masks should be used in preference to visors (or in conjunction with them), while the use of visors alone is discouraged.”
“However, in certain situations where a mask is not practical or cannot be tolerated (for example children with special needs, certain health issues) visors can be used as an alternative to masks,” the office said.
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