Covid-19 Masks: Dr. Jocelyn Songer of Maker Mask joins us - Part 1
b'Dr. Songer is the founder of MakerMask.org, a group of volunteers providing science-based mask information and designs to community mask makers. She\'s been studying and testing masks, and we talk to her about all kinds of things, especially Polypropylene. This is Part 1 of 2. For more information go to: http://makermask.org/.'