Hashem yaazor, I suspect that all the boys in group C will also test positive....
my son was in group C and left on Thursday. and he was positive on motzei shabbos. When he left, nobody in his grade had tested positive or was showing symptoms yet.
I hope your son is staying for the beginning of Succos, because if not, he will likely test positive when he gets home which will affect your whole family... good luck. would love to know if you are keeping him in yeshiva!
Took another test... Still negative.
There's a 30% positivity rate in the frum community in Baltimore now. Which means 70% still are negative... Even though 30% is insanely high.