From time to time someone in the church becomes a "cas contact". This means that someone they have been in contact with has contracted covid or has tested positive for covid. Omircon being so contagious, this seems to happen every couple of weeks. In fact, if we counted our teachers, then they'd be "cas contact" all the time since there's always some child or other off school.
Anyway, the drill is that if you are fully vaccinated (at present this means the two doses) and a cas contact you get yourself tested by test antigénique as soon as you can. If that test is positive then you are positive and you must isolate. If the test is negative then you must test again in 2 days' time... and so on.
Our excellent pharmacy does testing without a need for an appointment, so for us it would be quite easy to get tested, but so far none of our "cas contacts" has transformed into a "cas". We're very happy about that because informing all the church that they have to get tested is an unenviable proposition.