Cats living together in high numbers, including shelters and catteries, are at high risk for common cat viruses, including feline coronavirus. This virus usually causes mild diarrhea which improves on its own. However, in a small number of cats, infection can lead to a deadly disease called feline infectious peritonitis (FIP).
Go to full article: https://www.morrisanimalfoundation.org/study/developing-mrna-vaccine-feline-infectious-peritonitis