The poster highlights the critical role of handwashing in preventing the spread of infections. It emphasizes the importance of washing hands multiple times a day, even if they do not appear dirty, as handwashing is the most effective way to reduce the risk of illness. Specific recommendations include washing hands after using the toilet, before preparing food or eating, and after cleaning or changing a baby's diaper. The message underlines the need for consistent hygiene practices to protect health and prevent infections.