R
Rabies
Raccoon Roundworm Infection (Baylisascaris Infection)
Radiation Emergencies
Radiation Studies
Ramsay Hunt Syndrome Type I
Ramsay Hunt Syndrome Type II
Rasmussen's Encephalitis 
Recreational Water Illnesses
Reflex Sympathetic Dystrophy Syndrome
Refsum Disease
Refsum Disease, Infantile  
Refugees and Immigrants, medical examination of US-bound
Rehabilitation
Repetitive Motion Disorders   
Reproductive Health
Resistance, Antibiotic
Resistance, Antimicrobial
Respiratory Syncytial Virus
Restless Legs
Rett Syndrome
Reye's Syndrome
Ricin
Rickettsia rickettsii (Rocky Mountain spotted fever)
Rift Valley Fever
River Blindness (Onchocerciasis)
RMSF (Rocky Mountain spotted fever)
Rocky Mountain spotted fever (RMSF)
Rocky Mountain wood tick (Rocky Mountain spotted fever)
Rotavirus
Roundworms (Toxocara infection)
RSV (Respiratory Syncytial Virus)
Rubella