"Allergies are something where if you come into contact with it then it makes you sick somehow. Kind of like a curse only it isn't magical. It's just your body can't handle it."

That was probably the best way to describe allergies to someone from a time when they wouldn't have existed really. Well, they would have existed but people wouldn't have really understood them. That was probably the more accurate way to think of it. So best to describe it in a way that the man would be able to make sense of. Cheng was still learning a lot of this stuff, after all!

"Basically we want to make sure to not make you sick."