Cats that have recovered from cat distemper must be quarantined for 3-6 months before they can be placed with other cats. Because the feline distemper virus survives for a long time, cats that have suffered from cat distemper have certain antibodies in their bodies. Cat distemper will not be affected again in a short period of time, but there is no guarantee that the recovered cat will not have feline distemper virus in its body, so for the safety of other cats, it must be isolated for a period of time.