Chances are good that you know someone who’s allergic to cats. Most likely your cat already knows who might be allergic to them because cats seem to unerringly zero in on the one person who’s either allergic to cats or doesn’t like them.
Yet the basic science behind cat allergy is actually pretty simple. The cat danger contains a protein that triggers the body’s immune system to overreact through sneezing, coughing, and wheezing. The body’s immune system thinks it’s attacking a harmful virus or bacteria so it goes into overdrive.
While knowing this won’t help your cat allergic friends, it will at least help you understand what specifically makes people allergic to cats, even if your cat loves brushing up against such allergic people anyway. To learn more about cat allergies, read this article.