Yep there’s guidelines. The states where the cases are rising rapidly and hospitals filling up are the ones that opened too fast in opposition to the advice of the CDC and at the behest of the Administration that was anxious to reopen the economy
There are CDC guidelines for reopening schools too. The administration tried to suppress those guidelines and is threatening to cut funding to schools that don’t reopen in spite of those guidelines. In a conventional administration they would emphasize following the guidelines and help by providing resources. It’s bizarre to watch