那個，人對貓毛是不過敏的，過敏原是貓的唾液、尿液、皮屑裏的蛋白質。

But contrary to what you might think, it's not the fur or hair that's the real problem. People with cat allergies are really allergic to proteins in the cat's saliva, urine, and dander (dried flakes of skin). 

https://www.webmd.com/allergies/cat-allergies#1?