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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.