Since C19 was a major actor in the UK, we have an Isolation exemption for "Essential Workers". ie Truck drivers crossing Borders with food supplies medication etc.. Also includes Flight and Cabin Crew. All are double vaccinated of course, and tested before a foreign trip. seems common sense, if mandatory 14day Isolation was mandated every time a crew went to Paris and back, we would very quickly bring airline aviation to a halt?
There has been no widespread C19 infection problems. even though mask wearing and social distancing cannot be routinely possible in the confines of a flight deck.