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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.