A Clunky, Reusable Mask May Be the Answer to N95 Waste - The New York Times
Reusable respirator could ease COVID-19 medical mask shortages – LabNews
Meet The Italian Engineers 3D-Printing Respirator Parts For Free To Help Keep Coronavirus Patients Alive
Powered Respirator (PAPR) use for prevention of highly infectious viral diseases in healthcare workers
Conversion of self-contained breathing apparatus mask to open source powered air-purifying particulate respirator for fire fighter COVID-19 response - ScienceDirect
Respirator and Mask Types
Explainer: N95? KF94? Which mask is best at protecting against COVID-19 | Reuters
Reusable Elastomeric Respirators | 3M Medical | 3M United States
Exploring respirator options for protecting health workers from COVID-19 | CIDRAP