Create your 3D printed breathing mask
It is yet unclear whether they become mandatory. In any case their impact is subject to discussion and they are hard to get. We're talking breathing masks.
Anyway, our associate Gerald got bored on his sofa and then came up with an easily renewable mask that can be built using a 3d printer and common houshold materials.
You can download 3D print data and instructions for free here:
http://www.cppinfo.net/Breathing_Mask...