The Call Is Coming From Inside the House

Zombie myths have captured imaginations for centuries, but their roots may lie in real-world infections that alter behavior in terrifying ways. This chapter explores the biological underpinnings of the zombie archetype, beginning with cultural practices surrounding Haitian Vodou and moving into the realm of neuroscience and virology. Rabies serves as a chilling real-world analog to zombification, with symptoms like aggression, hydrophobia, and loss of cognitive control emerging as the virus travels from the bite site to the central nervous system. The chapter also examines Toxoplasma gondii, a parasite capable of rewiring host behavior and reducing fear responses, particularly in rodents. By tracing the ways infectious agents can alter motivation, movement, and fear, this chapter offers a grounded, scientific perspective on one of the most enduring horror tropes—and explores what happens when the threat isn’t supernatural, but biological, and it’s already inside the body.