ABC while a bit of a left bias is generally a good source, but perhaps this one?

https://www.stripes.com/news/us/dod-...s-low-1.648730

“We found that on cough stimulations [with the mask], there was a very large reduction in aerosol that would come from the mannequin — greater than 95% in most cases. It greatly showed the benefit of wearing a mask during a flight for these tests,” said David Silcott, an author of the study from S3i, a biological research company.

From the study itself...Larger droplets (50 to 100s of μm) generated and co-released with smaller modes when talking, coughing, or sneezing introduce an alternative transmission mechanism, which face masks have been shown to statistically reduce in other literature (Leung, et al. 2020; Macintyre, et al. 2020). Testing assumes that mask wearing is continuous, and that the number of infected personnel is low.

The study was based on known mask effectiveness combined with the already excellent cabin filtration we have. When you drill down to the tables of BM vs. BNM the numbers were slightly better with a mask. As we know, cabin air is already super clean, the masks just add an additional element of protection.

Our industry is doing our part as someone else noted, we'll be ready for the world to return.