Cat coronavirus is a common virus that is infected through the fecal-oral cavity and is infected through contact with the surrounding environment. You can live as a carrier for life, and part of the coronavirus-carrying cat can be transformed into Feline Infectious Peritonitis. Symptoms include vomiting, diarrhea, and rare severe enteritis, and when converted to FIPV, loss of appetite, weight loss, fever, jaundice, hemolytic anemia, and kidney hypertrophy.