FeLV stands for Feline Leukemia Virus. It is highly contagious, weakens the immune system, is spread from cat to cat when grooming and sharing food/water. It is known as the “friendly cat” disease because of how it is spread. It is one of the most common infectious diseases.
FIV stands for Feline Immunodeficiency Virus. It is spread from cat to cat usually through fighting i.e. biting and scratching. It is one of the most common diseases among cats. It weakens the immune system therefore making it easier to catch secondary infections and illnesses. Cats at more risk of contracting FIV are those going outside, no vaccinations, living with other cats, a lack of being spayed or neutered and aggressive behavior. These risks are also for FeLV
Both of these diseases can be managed. The best treatment is vaccinating before your kitty gets either of these. Monitoring their health with proper exams with your veterinarian can allow your kitty to live a relatively normal life.