Americans do need to quarantine upon return to the US, although I'm not sure how much enforcement there is: https://thehill.com/homenews/administration/535344-

Americans do need to quarantine upon return to the US, although I'm not sure how much enforcement there is: https://thehill.com/homenews/administration/535344-biden-requires-international-traveler-to-quarantine-upon-arrival-to https://thehill.com/homenews/administration/535344-biden-req...