Just travelled north east from Korat along the western by-pass and a few km from Thai Watsadu encountered a police check. Not an ordinary police check; any male under about 40 was required to go to a nearby tented complex to give a urine sample. Didn't see any women walking there and my wife and I (75) were not required to do so.
Interesting as it has nothing to do with Coprona Virus and everything to do with drugs. Police weren't looking for drugs as no vehicles were being checked, but targetting those who had been or might have been taking them.
I suppose one can say this isn't a lot different from a "please blow in this bag" check, but this is the first time I have encountered this one in 22 years here.