|
|
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.
Asthma cases in Americans are about 75% higher today than they were in 1980.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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.