Preventive health measures are often low-cost and can substantially reduce the incidence of common illnesses. For rural households, practical actions that require minimal resources are especially valuable.High-impact, low-cost practices include:Hand hygiene: Regular handwashing with soap at key times (after using the toilet, before eating, and before preparing food) dramatically reduces infections.Safe drinking water: Boiling water, using simple filtration, or leaving water in sunlight in clear bottles (SODIS) can lower waterborne diseases.Nutrition basics: Encourage dietary diversity using locally available foods; focus...