This was not simply a question of “mask or no mask,” but of design, construction, supply, and use. The wearer needed to use a well-designed mask properly, and change masks frequently. Therefore, most of the expert complaints about masks around the Spanish Flu pandemic in the US seemed to be about the users and reliable access to steady supplies of properly constructed masks, not the concept of wearing a mask.
Cutouts is an open source application. Code licensed under the MIT license. Copyright 2018 Siddharth Kannan