“…1 Such studies model droplet size and/or dispersion through ultraviolet (UV)-visible cough simulators (e.g., fluorescein emitted from a mucosal atomization device (MAD), spray gun, or pressurized canister) placed within cadaver heads, medical mannequins, or human subjects. [2][3][4] However, these modes of simulation are often expensive, single-use, uncomfortable for human participants, and not readily accessible to researchers. Subsequently, we sought to identify an inexpensive, easily replicable means of assessing respiratory droplet spread using readily available materials, open-source software, and a smartphone-based cobalt blue light application.…”