This document discusses various health topics including what is health, hepatitis, thyroid, AIDS, rabies, and tuberculosis. It defines health as a state of complete physical, mental and social well-being according to the WHO. Hepatitis is inflammation of the liver which can be self-limiting or progress to scarring and cirrhosis, with the most common causes being viruses A-E. The thyroid gland regulates metabolism and is located in the neck, and thyroiditis can cause alternating hyperthyroidism and hypothyroidism. AIDS is transmitted through sexual contact, body fluids and from mother to child, but not through feces or vomit unless contaminated with blood. Rabies causes brain inflammation and symptoms occur 1-12