Oh, I see. And ugh, that's a mess. We have a lot of guidelines here about being screened for possible COVID before going to a doctor's office or ER. Like when I saw my gynecologist last week, I had to fill out a sort of checklist saying I hadn't had symptoms, hadn't had any known exposures, etc., then get the "COVID pass" at the end of it. When I saw my regular doctor a couple months ago, they also checked my temperature at the door before letting me in (though I've read temperature checks don't really mean much). But I imagine people could just lie on those screening questionnaires if they wanted.
With my D's school, we're supposed to keep her home if she has one symptom in a list of fever, cough, and...something else, or two symptoms in this other list. And if they show certain symptoms at school, a parent/guardian is required to pick them up within an hour. When she had the stomach bug last week, because that can potentially be a sign of COVID, we got her tested (she was negative) just to be safe. However, I worry that other parents won't be as careful.
ETA: And June's not too far away!