Surgical masks are not PPE. 
Source, modified for brevity: cdc.gov/niosh/npptl/pd…
If you create a good seal with a mask brace, so they fit tightly, surgical masks can serve decently as PPE.
Universal use of surgical masks can keep the air relatively clean -- only if everyone wears them. However, once there are people who won't wear masks, a surgical mask provides less-than-optimal protection against the aerosols that the unmasked people are producing.
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