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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Approximately 500,000 babies are born each year in the United States to teenage mothers.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.
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.