The World Health Organization launched World Hand Hygiene Day in 2009 as part of its "SAVE LIVES: Clean Your Hands" campaign, building on the earlier "Clean Care is Safer Care" initiative from 2005. The date, 5/5, was chosen symbolically to represent two hands, each with five fingers — a simple, memorable nod to the day's message. Healthcare-associated infections remain one of the leading threats to patient safety worldwide, and studies consistently show that proper hand hygiene at critical moments of care dramatically reduces the spread of infection in hospitals and clinics. The day primarily targets healthcare workers, while also inviting the general public to embrace this simple, effective habit. Health ministries and hospitals around the world mark the occasion with training campaigns and workshops on correct handwashing and sanitizing technique, distribute awareness materials, and monitor how well medical staff adhere to recommended hygiene standards — all working toward the shared goal of safer, infection-free care.