Battling COVID-19 in 3D

Yesterday, I made a reusable respirator face mask at home with a 3D printer.

Design file credit from Thingiverse: https://www.thingiverse.com/thing:4228729

It’s obviously not medical grade, though may have potential to be helpful in combatting supply shortages since constructed of semi-rigid nylon polymer capable of withstanding repeated use. Sanitization is possible using alcohol or other reagents. The two pieces interlock, and can fit disposable filters or antimicrobial/viral textiles with various pore sizes between the gap to prevent droplet and microbe spread. I tested with a regular coffee filter as well as circular pieces cut from surgical masks between...