- Tabun (GA)
- Taenia Infection — see Human Tapeworm
- Taeniasis — see Human Tapeworm
- Talaromyces marneffei Infection
- Talaromycosis
- Tapeworm Infection — see Human Tapeworm
- Tapeworm, Dog and Cat — see Dog and Cat Tapeworm
- TB (Tuberculosis) Vaccination — see Tuberculosis Vaccine (BCG)
- TB Data & Statistics
- TB Education and Training Network
- TB Surveillance Reports — see TB Data & Statistics
- TB Testing & Diagnosis
- Tear Gases — see Riot Control Agents
- Technology Transfer
- Teen Dating Violence
- Teen Drivers
- Teen Health — see Adolescent Health
- Teen Pregnancy
- Adolescent Health
- Pregnancy
- Reproductive Health
- Terrorism
- Tetanus (Lockjaw) Infection
- Tetanus (Lockjaw) Vaccination
- Text Messaging — see Mobile
- Thalassemia — see Cooley’s Anemia
- Thallium
- Thimerosal (Mercury) and Vaccines
- Thoracic Aortic Aneurysm — see Aortic Aneurysm
- Throat, Sore — see Sore Throat
- Thrombophilia — see Venous Thromboembolism
- Thrombosis — see Venous Thromboembolism
- Thrush — see Candidiasis
- Tick and Louse-borne Relapsing Fevers
- Tick-Borne Encephalitis (TBE)
- Tick-borne Relapsing Fever — see Tick and Louse-borne Relapsing Fevers
- Tickborne Diseases — see Ticks
- Ticks
- Tinea — see Ringworm
- Tobacco and Cancer
- Tobacco Use, Smoking and — see Smoking and Tobacco Use
- Tobacco, Smokeless (Oral) — see Smokeless (Oral) Tobacco
- Toddlers — see Infants
- Tornadoes
- Total Worker Health
- Tourette Syndrome (TS)
- Toxic Substances Incidents Program, National — see National Toxic Substance Incidents Program (NTSIP)
- Toxocara Infection — see Toxocariasis
- Toxocariasis
- Toxoplasma Infection — see Toxoplasmosis
- Toxoplasmosis
- Training Development
- Public Health Training
- Transatlantic Taskforce on Antimicrobial Resistance (TATFAR)
- Transmissible spongiform encephalopathies — see Prion Diseases
- Transparent Reporting of Evaluations with Nonrandomized Designs (TREND)
- Transplant Safety
- Transportation
- Transportation Safety
- Traumatic Brain Injury & Concussion (TBI)
- Traumatic Incident Stress
- Emergency Responders
- Stress, Occupational
- Travelers’ Health
- Travelers’ Required Immunizations
- Traveling with Children
- Traveling with Pets
- Treating for Two
- Trench Fever — see Bartonella Infection
- Trenching and Excavation
- Treponema pallidum Infection — see Syphilis
- Tribal Advisory Committee (TAC)
- Tribal Affairs
- Tribal Consultation Policy
- Tribal Road Safety
- Trichinella Infection — see Trichinellosis
- Trichinellosis
- Trichinosis — see Trichinellosis
- Trichomonas Infection — see Trichomoniasis
- Trichomoniasis
- Trichuriasis — see Soil-Transmitted Helminths
- Trichuris trichiura Infection — see Soil-Transmitted Helminths
- Trisomy 21 — see Down Syndrome
- Trypanosoma brucei: Infection — see Sleeping Sickness
- Trypanosoma cruzi Infection — see Chagas Disease
- Tsunami
- Tuberculosis (TB)
- Tuberculosis (TB) Vaccination — see Tuberculosis Vaccine (BCG)
- Tuberculosis in the Workplace
- Tuberculosis Skin Test — see TB Testing & Diagnosis
- Tuberculosis Training — see TB Education and Training Network
- Tuberculosis Vaccine (BCG)
- Tularemia
- Tuskegee Health Benefit Program
- Tutorial, NHANES — see NHANES Tutorial
- Typhoid Fever and Paratyphoid Fever
- Typhoid Fever Vaccination
- Typhus Fevers
It's never too early or too late to work towards being the healthiest you.