Public health refers to the science and practice of preventing disease, prolonging life, and promoting health through organized efforts and informed choices of society, organizations, public and private, communities, and individuals. It involves a range of activities aimed at improving the health of populations, including disease prevention, health promotion, and health protection. Public health professionals work across various sectors to address factors that influence health, such as environmental hazards, lifestyle behaviors, socioeconomic status, and access to healthcare. By implementing policies, conducting research, and collaborating with diverse stakeholders, public health efforts strive to achieve equitable health outcomes and enhance the overall well-being of communities.