Handwashing is the act of cleaning your hands with soap and water to remove dirt, germs, and harmful bacteria. When you wash your hands properly, you wet them, apply soap, scrub for at least 20 seconds (about the time it takes to sing “Happy Birthday” twice), rinse thoroughly, and dry them.

This simple habit is one of the most powerful ways to prevent illness. Germs spread easily through touch: when you touch a doorknob, shake someone's hand, or pet an animal, invisible bacteria and viruses can transfer to your skin. If you then touch your face, those germs can enter your body through your eyes, nose, or mouth. Proper handwashing breaks this chain.

Doctors and scientists consider handwashing so important that it has saved millions of lives throughout history. In the 1840s, a Hungarian doctor named Ignaz Semmelweis discovered that when doctors washed their hands between patients, far fewer people got sick and died. Before this discovery, even doctors didn't understand how diseases could spread through dirty hands.

Today, handwashing remains crucial. People are encouraged to wash their hands before eating or preparing food, after using the bathroom, after playing outside, after touching animals, and when caring for someone who's sick. During disease outbreaks, consistent handwashing becomes even more vital for protecting yourself and others.