Actually, it's the cat's SALIVA that causes allergies. They groom themselves 13 hours a day according to feline statistics I read this morning. The saliva dries and then goes into the air.

The only cats I can think of that might be good for people who are allergic is either a Sphynx (of course, I'm prejudiced cuz I have one ) or another distant cousin is the Cornish Rex or Devon Rex. Both the CR and DR have short wavy hair and don't shed much.

Unfortunately, they can be expensive. I got MooShoo as a rescue from a bad breeder. He's blind in his right eye and has partial vision in his left from a herpes virus she neglected to treat, which caused scar tissue on both his corneas. However, that does not stop him from tearing through my house. All 3 breeds have wonderful dispositions, are very loyal, and love attention.