Rheumatoid arthritis (RA) is a long lasting autoimmune disorder that primarily affects joints. It typically results in warm, swollen, and painful joints. Pain and stiffness often worsen following rest.Most commonly the wrist and hands are involved with typically the same joints involved on both sides of the body.heumatoid arthritis (RA) is a long lasting autoimmune disorder that primarily affects joints. It typically results in warm, swollen, and painful joints. Pain and stiffness often worsen following rest.
tuberous sclerosis a congenital heredofamilial disease, transmitted as an autosomal dominant trait, characterized principally by the presence of hamartomas of the brain (tubers), retina (phakomas), and viscera, mental retardation, seizures, and adenoma sebaceum, and often associated with other skin lesions.
About contagion and contagiousness: Contagion and contagiousness refers to how easily the spread of Parainfluenza is possible from one person to another. Other words for contagion include infection, infectiousness, transmission or transmissability.Contagiousness has nothing to do with genetics or inheriting diseases from parents.t is not caused by a defective or abnormal gene. The contagious disease, Parainfluenza, can be transmitted: 1  from person to person by saliva, air, coughing, contact, surfaces, fecal-oral route, etc.