Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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Women are 50% to 75% more likely than men to experience an adverse drug reaction.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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.
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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.
Gram Stain Concept Map
Breathing Concept Map
Concept map
An old concept of genetic transmission—a homunculus in a sperm cell.