What’s Going On in Your Body When You Watch a Horror Movie

You immune system goes into overdrive
First, a quick recap in case you slept through this day in science class. Leukocytes are white blood cells, and the U.S. National Library of Medicine says this group of cells are responsible for fighting disease and infection. There are lots of them, and they even govern our body's reaction to things like allergies. They're great, but watching scary movies puts them on red alert.