gzt:
freitasm: Interesting thread (Twitter below, full thread reader unrolled here):
Was the infection source or sources wearing a mask?
Herein known as A. And B.
Yes.
https://wwwnc.cdc.gov/eid/article/27/3/20-4714_article
But that's self-reported. And as it suggests, believed they remove for food service etc. So lots of variables still allow for contamination mixed with the stopovers and so on