i am allergic to cats!
You are just reacting to  to one or more allergens produced by cats.
oh yea? i never had issues with them until recently
Allergy to cats
Cat allergy in humans is an allergic reaction to one or more allergens produced by cats. The most common of these allergens are the glycoprotein Fel d 1, secreted by the cat's sebaceous glands and Fel d 4, which is expressed in saliva. An allergic reaction is a histamine reaction that is usually characterized by coughing, wheezing, chest tightening, itching, nasal congestion, rash, watering eyes, sneezing, chapped lips, and similar symptoms. In some severe cases, reactions may progress rapidly to
them turns them into toys exactly like the one he found in Sally Bones' territory, that weren't quite alive but weren't quite dead either because they were once alive. However, methods of doing so have never been found (they come back out with glassy eyes and collars, are permanently smiling, and say phrases such as "Hello nice to meet you I am fine"). Varjak, upon finding out the truth, is horrified and engages battle with the two black cats. He uses every method of