Category Description: This category encompasses research on the health of populations and the systems and policies that shape it. Topics of interest include epidemiology and disease surveillance, health promotion and disease prevention, nutrition and lifestyle, health systems and financing, health equity and social determinants of health, environmental and occupational health, and global health challenges, particularly in low- and middle-income countries. Contributions may analyze local, national, or cross-national contexts and are encouraged to link evidence to policy and program implementation.