Learn about a deadly cat disease that is infectious and spread from cat to cat. It is called Feline AIDS is also known as FIV or Feline Immunodeficiency Virus. It is spread primarily by bite wounds from cat to cat. If you didn't catch that article, this sums it up pretty well and tells you what you should know.
Go to: What You Should Know About Feline AIDS
I promised you I'd also tell you about another important cat disease - also infectious and spread cat to cat. It is called Feline Leukemia Virus. Many refer to it as "Fe-leuk" - pronounced Fee-luke. It is commonly abbreviated as FeLV.
Many people may know about the virus but they may not know what to do or how to test for it.
The most important thing to know is that any NEW cat you go to bring into your home should be tested. 100%. The new cat should be separated from your other cats for 1 month (ideally) and retested about a month later. This can vary a little depending on the cat's (or kitten's) age.
PLEASE, PLEASE, PLEASE - If you find a new cat, take him to your vet before you take him home. Have your cat tested for Feline Leukemia and the Feline AIDS test. This is a combo test (FeLV/FIV) - and depending on where you live it can cost anywhere from $30 to $60. It is important to keep your existing cats safe! Don't be foolish. Please.
This is one of the worst things cat owners do. They are well intentioned but do the wrong thing.
Learn more about testing - go to Feline Leukemia and Feline "AIDS" Testing
There are also vaccines for both of these diseases. Learn more about them. GVaccine Recommendations for Your Cat
I hope this gives you a little more information about feline aids virus.