Coryza is a common disease in cats, but it is also very dangerous. Typhus in cats is also called feline panleukopenia.
Feline leukosis does not necessarily trigger symptoms, but cats have a fragile immune system and are therefore more easily victims of other diseases. If your pet is sick, consult a veterinarian. It is recommended to vaccinate the cat when it is still a kitten, i.e. before it is 12 months old. The vaccine is more effective during this period.