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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.
The familiar sounds of your heart are made by the heart's valves as they open and close.
Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.