It is the science of psychology that is being used. It is the only science that makes any sense to use a mask for a virus.
I liked it when it came in a glass bottle that you could return for a nickle. Spent a lot of time as a child collecting that sort of trash in the neighborhood and turning it in at the end of the week.
And also moulds and mildew.
Notable
Diplomats did much of the shady shit in Xfiles. Makes sense what with immunity and all.