The U.S. Public Health Service (USPHS) is a division of the Department of Health and Human Services. It focuses on protecting and promoting public health through various programs and initiatives. The USPHS is composed of the Commissioned Corps, a group of health professionals who serve in various roles, including disease prevention, health education, and emergency response. The USPHS also collaborates with other federal agencies, state and local governments, and community organizations to address public health challenges. Its mission includes improving health outcomes, controlling diseases, and ensuring access to healthcare for all Americans, particularly in underserved areas.