My heart goes out to you and your community. This is the news that we all dread.
I guess it depends on the kid. I know for me I would probably have to do therapy to address this and encourage my kids to do so. If you have a parent chat with supportive parents, maybe that would help. I’m sure this is a support group that you never wanted to be a part of, but you will understand each other. If it’s possible, it makes sense to block off the area where this happened, at least until January.
It’s close to the holidays so this might be a good time to keep them at home, unless they would benefit from being around their peers. I’m sure the teachers will be very understanding and give them take home work, esp if you have Covid protocol and kids are staying home for that. And if they need time off, so be it.
"Friendship is born at that moment when one person says to another, "What? You, too? I thought I was the only one." C.S. Lewis