Thanks for the study. From 2009. Some of us learned this back during the Avian Flu scare. Along with how a virus is transmitted, etc. At this stage of the game it seems that the stage is pretty well set with the masks on one side and the no-masks on the other.
Thankfully for most of us, the play is mostly over, except for the governors droning on and on.
Here is another study that examines they type of fabrics and their effectiveness. The methods of the study are quite sophisticated:
https://pubs.acs.org/doi/10.1021/acsnano.0c03252
The results give similar positive verification of safety for the different fabrics used depending on their thread-count and electrostatic efficiency.