Contents xii Snow, John (1813–1858) 577 Social Cognitive Theory (SCT) 579 Social Determinants of Health (SDOH) 582 Social Ecological Model 586 Social Security Act (SSA) 589 Society of Public Health Education (SOPHE) 592 Spiritual Health 594 Sports-Related Concussions (SRCs) 597 Stark Law 600 State, Local, and Territorial Health Departments 602 Substance Abuse and Mental Health Services Administration (SAMHSA) 604 Surgeon General 607 Syringe Service Programs 609 Transtheoretical Model (TTM) 613 Truth Campaign, The 615 Tubman, Harriet (1822–1913) 618 Tuskegee Syphilis Study 620 Upstream Public Health Practices 625 U.S. Department of Agriculture (USDA) 626 U.S. Department of Health and Human Services (HHS) 628 U.S. Public Health Service (PHS) 630 Vaccines 633 Veterans’ Health 636 Violence 639 Wald, Lillian (1867–1940) 643 Waterborne Diseases 645 Wegman, Myron Ezra (1908–2004) 648 Winslow, Charles-Edward Amory (1877–1957) 650