The cat's vaccine protection failed and it came into contact with the source of infection and became sick; the feline distemper virus has a very strong survivability, and the long-term detoxification of recovered cats can last for more than one year. At this time, unimmunized cats will also be infected if they come into contact with recovered cats; Dirty living environment, high stress in cats, and malnutrition in cats may cause cats to suffer from feline distemper.

The cat has not been vaccinated, the timing of the vaccine injection is incorrect, and the vaccine does not produce antibodies in the cat, etc., etc., etc., will cause the cat's vaccine protection to fail. If the cat comes into contact with the sick cat’s feces, urine, vomit, or any object with the virus attached to it at this time, it is very likely that the cat will contract feline distemper.

Recovered cats can detoxify for more than a year and are still capable of infection. Therefore, if the owner wants to live with two cats, he must remember to vaccinate the cats, and then it is best to contact them one week after the vaccination. Be sure to disinfect the environment at home to reduce the chance of infection.

Dirty living environment, high stress in cats, and malnutrition in cats may cause cats to contract feline distemper, and affect the chances of cats being cured. Excluding factors such as vaccine immunity failure and low resistance caused by some chronic diseases, some elderly cats suffer from feline distemper, which is probably related to high environmental pressure and severe malnutrition.