It is interesting that the cotton masks were more effective than the surgical mask: >The median viral loads after coughs without a mask, with a surgical mask,

It is interesting that the cotton masks were more effective than the surgical mask: >The median viral loads after coughs without a mask, with a surgical mask, and with a cotton mask were 2.56 log copies/mL, 2.42 log copies/mL, and 1.85 log copies/mL, respectively My point was that if the statement read Scientific evidence shows masks are not effective it would means something. The lack of evidence showing effectiveness does not disprove effectiveness.