The headlines and what the reasoning is behind them:
Austria makes masks compulsory as protection debate shifts!
From Czech Doctors & Citizens – The CRUCIAL MISSING Coronavirus Protection Guideline https://www.youtube.com/watch?v=hVEVve-3QeM
A University of San Fransisco research scientist shows how anyone can make a mask using a long sleeved T shirt, scissors and a paper towel as a filter. He shows how to cut the t-shirt and it is utterly simple and easy to do. He tells us the scientific data on masks and what materials work.
How Czech Republic Maintains Low Contagion https://www.youtube.com/watch?v=T2dOs-LhJaQ
How to make your own mask https://www.youtube.com/watch?v=4FB–BOyTiU
I would add that I use construction masks that I got at Home Depot: less than $10 for one box with 50 masks. Not sure whether they are still available.