I am from the Czech Republic. Face masks have been mandatory here for two weeks. Of course, there is a shortage of face masks and respirators. But many people here started to sew them for their families and others. All this happened in a week or so. Suddenly, everyone has their face covered in one way or another. These handmade masks are typically from cotton. Of course, they are not reliable to keep you safe. But I think they contribute to limiting the spread because:
1. When shopping etc., it remains you that others are potentially infected.
2. It keeps you from involuntary touching your face.
3. It limit droplets from the infected (no matter if they have symptoms or not) by up to 80 %.
I think it is worth watching to see if this proves to work. https://www.google.com/amp/s/amp.theguardian.com/world/2020/mar/30/czechs-get-to-work-making-masks-after-government-decree-coronavirus