Salmonella typhi infection [Typhoid Fever] Salmonella Infection [Salmonellosis] SARS [Severe Acute Respiratory Syndrome] Scabies Scarlet Fever Schistosomiasis [Schistosoma Infection] Seasonal Flu Sepsis [Septicemia] Shigella Infection [Shigellosis] Shingles [Varicella Zoster Virus (VZV)] Sickle Cell Disease SIDS (Sudden Infant Death Syndrome) Sinus Infection [Sinusitus] SLE (Lupus) Sleep and Sleep Disorders Smallpox Smoking and Tobacco Use Soil Transmitted Helminths Sore Mouth Infection [Orf Virus Infection] Sore Throat Southern Tick-Associated Rash Illness (STARI) Spina Bifida [Myelomeningocele] Staphylococcus aureus Infection Strep Throat Streptococcus pneumoniae Infection Stress, Occupational Stroke Strongyloidiasis Swimmer’s Itch [Cercarial Dermatitis] Swimming-related Illness Swine Influenza Symptom Relief for Upper Respiratory Infections Syphilis Systemic lupus erythematosus