Unfortunatelly, this (mandatory masks) seems like one of the Czech Republic rules that has not yet been widely copied elsewhere.

BTW, its quite an interesting cognitive change - basically in a span of about two days everyone in public has a mask, even anchors and politicians in news coverage! Even the sign language interpetters!

Also I found out I feel rather uneasy now watching footage from affected areas, some of them in worse situation than us, with people not wearing any masks.

Such a simple way to protect otjers once you thing about it a bit, yet not universally adopted so far...