Zoe had been smoking on and off since she was 18, eventually switching to larger vaping devices for several years. When she recently moved to disposable vapes, her lungs reacted violently to a chemical in the products, triggering hypersensitivity pneumonitis—a serious allergic reaction that can cause lung scarring and severe breathing difficulties. She spent nine days in the hospital, including four days on oxygen, and described the experience as terrifying and surreal.