There was evidence of the effectiveness of masks. They chose to diminish/ignore that evidence because it was inconvenient to protecting the supply of masks.
There were two studies circulating around that time. One of passengers of a bus and another of a restaurant. The bus one found that the passengers wearing masks did not catch the virus and many of those that did not wear masks did catch it. The restaurant one found that people in the flow of AC air caught it and those not in it did not. That meant that it was airborne and there was some evidence suggesting mask effectiveness.
Why should you listen to the CDC, WHO, etc… when there is a better predictor of reality?
There were two studies circulating around that time. One of passengers of a bus and another of a restaurant. The bus one found that the passengers wearing masks did not catch the virus and many of those that did not wear masks did catch it. The restaurant one found that people in the flow of AC air caught it and those not in it did not. That meant that it was airborne and there was some evidence suggesting mask effectiveness.
Why should you listen to the CDC, WHO, etc… when there is a better predictor of reality?