Every year on May 5, the world marks World Hand Hygiene Day. Hand hygiene disrupts transmission of pathogens like E coli, influenza, and SARS-CoV-2. Studies show a 30–50% drop-in infection rates with regular handwashing. Proper technique—20 seconds, soap, friction—remains one of the most effective public health tools. Soap and water remove more than dirt—they break disease chains.