You've hit the nail on the head, it can only put into the system stats if its detected and in some countries their simply is'nt the facility especially 3rd world countries to test.
Carry on as normal and if your at risk then only react if and when. On the subject of hygiene, I always wash my hands after every toilet visit. I'm still amazed when say I'm out how many fella's don't bother then open the door via handle leaving the loo.
The corona virus has highlighted hand hygiene once again as a possible
A while back, where I work, we had agency workers on the shop floor and many of them were total animals. The bogs were unbelievable.
Having said that (on my Mother's life), I witnessed a senior finance manager leave a bog cubicle, leave the bog, start using the coffee machine. No need for hand washing or anything like that...
People used to laugh at me for using paper towels to operate taps or open doors. Most have now changed their mind.
Well, a bit pestilence will thin the population. The crusties want that don't they?