Kids with cat plague can persist for about 3 to 7 days, depending on the cat's physical condition. If the kitten's constitution is relatively good and treated in time, it can last longer or even recover. If the kitten is in poor physical condition and is not treated in time, it may die quickly. When a kitten is found to be infected with cat distemper, it must be isolated and treated in time, so that the hope of cure is greater.