What? I Could be Allergic to That?! is a casual and fun look at some unusual allergies that people can have. This book contains allergies your doctor may not even know about. The authors Ratika Gupta MD and Niha Qamar MD are allergists and immunologists, and they were fascinated by what they were treating every day. Patients were coming in with reactions to the strangest things like water, cold air and even money.