Handwashing with soap is one of the best ways to stay healthy. Handwashing with soap can reduce diarrheal episodes by 28–47% and can reduce acute respiratory infections, such as pneumonia, by 20 to 50%.
Source: Ejemot-Nwadirao et al., 2015; Curtis & Cairncross, 2003; Rabie & Curtis, 2006; Ejemot et al., 2008; Townsend, Greenland, & Curtis, 2017; Luby et al., 2005)