Elena blinked. The smell of old paper was gone, replaced by the scent of sulfur and stale beer. She was standing on a cobblestone street.

She walked further into the "Cytokine City." It was a bustling marketplace. She saw a baker throwing loaves of bread into the air. The bread was shaped like the number 4. "Baker... Bread... IL-4," she murmured. "Switches to IgE. Allergies." She looked at the ground. The cobblestones were shaped like Immunoglobulin G.

She looked down at her hand. She was holding a giant, wooden spoon. IL-2, her mind whispered, unbidden. T-cell growth factor.

Sketchy pathology videos are a testament to the creativity of modern medical learners. In an era of information overload, they provide a necessary anchor for the chaotic sea of diseases. They are not "cheating." They are an adaptation.