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People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
The human body produces and destroys 15 million blood cells every second.