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Vaccines prevent between 2.5 and 4 million deaths every year.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
People about to have surgery must tell their health care providers about all supplements they take.
Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.
The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.