I still think that something like a flu (proper) and similar infections should result in mandatory quarantine from public places. Ofc a law for employers to offer either work from home or fully-paid sick leave for the duration of this mandatory quarantine would be required. And yes, I am advocating for jail without probabtion being possible (not long though, like a week or two should be enough for minor infractions), so that the risk of violating the quarantine is more predictable.