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A comment on Study: Association between mask mandates and Covid infections in North Dakota. Parent comment
Pretty much all masks are surgical 3ply now, at the start of covid it was quite hit and miss, alot of 'surgical' were not 3ply.
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Pretty much all masks are surgical 3ply now, at the start of covid it was quite hit and miss, alot of 'surgical' were not 3ply.