The American Public Health Association (APHA) is a professional organization dedicated to improving public health in the United States. Founded in 1872, it brings together public health professionals, researchers, and advocates to promote health policies and practices that protect communities. The APHA focuses on various issues, including disease prevention, health education, and health equity. The organization publishes the American Journal of Public Health, which features research and articles on public health topics. APHA also hosts an annual meeting that gathers thousands of public health experts to share knowledge and discuss current challenges in the field.