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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
Medication errors are more common among seriously ill patients than with those with minor conditions.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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.