This document discusses patient safety and the World Health Organization's (WHO) efforts to promote it. It notes that 1 in 10 hospital patients are harmed, medical errors cost billions annually, and the chances of being harmed during healthcare (1 in 300) are much higher than during air travel (1 in 1,000,000). The WHO works to improve patient safety through research, public campaigns on hand hygiene and safe surgery, education and training, implementing solutions, and engaging patients. Its goals are to make healthcare delivery safe for all patients by strengthening health systems and addressing this serious public health issue.