The Public Health Service (PHS) is a division of the U.S. Department of Health and Human Services. It focuses on protecting and improving the health of the American population through various programs and initiatives. The PHS is responsible for addressing public health issues, conducting research, and providing health education to communities. The PHS is also known for its commissioned corps, which consists of health professionals who serve in various roles, including disease prevention and health promotion. This corps works alongside other agencies, such as the Centers for Disease Control and Prevention (CDC) and the National Institutes of Health (NIH), to enhance public health efforts nationwide.