13th Lecture of Microbiology (Complement Fixation test)

@harispixelshorts on Instagram: "In the late 1990s, Amsterdam's Schiphol Airport added small fly images to men's urinals to test an idea about human behavior. The concept came from airport facilities manager Aad Kieboom, who used a principle called "target fixation", the subconscious human tendency to aim at visible targets. By giving men an aiming point positioned near the drain, the fly image reduced spillage by approximately 80%, cutting cleaning costs significantly. The urinal fly worked so