Chat about Novel Coronavirus - 2019-nCoV - COVID-19

You only need to wear something that covers your mouth and nose (a buff will do) and only in ÖPNV and shops. It's compulsory yes, but shouldn't influence PPE supplies at all.

This.
And there is some slight evidence, T Greenhalgh
https://www.bmj.com/content/369/bmj.m1435

to suggest this is workable and doable.