The mask is a bit of a bugbear, as from relatives on the ground, they have had no instructions over the safe handling of them. Speaking to the step father-in-law yesterday who does meals on wheels type deliveries, and he has the same masks and gloves on all day, bar when he takes them off to have a smoke. Masks and gloves work in a clinical setting because they're used for one procedure and then replaced.
It's also the case that the vast majority of people are wearing cotton masks, often having sewed them at home themselves, so the protection is nowhere near as robust as it might be, and they're not practicing social distancing measures very robustly. As said, many Czech folk have weekend cottages (from the communist days when overseas travel was largely banned), and many have still been visiting those regularly, often with family and friends coming together (it's common for the cottage to be a family cottage so used by the extended family).
It's certainly an interesting one from a purely intellectual point of view, but with quite a number of elderly relatives there, hopefully they continue to confound logical expectations.