The phrase "less illness" means a decrease in the number or severity of sicknesses among individuals, communities or populations. It could refer to a reduction in the prevalence of certain diseases or conditions, resulting from various factors such as improved hygiene and sanitation practices, better access to healthcare services, advances in medical research and treatments, changes in lifestyle habits, and other preventive measures. The goal of public health efforts is often to achieve "less illness" by promoting healthy behaviors and reducing the risk factors for disease.