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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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.
Medication errors are more common among seriously ill patients than with those with minor conditions.
![Flower part number is a characteristic difference between monocots and eudicots (a) Flowers and buds](https://biology-forums.com/gallery/47/medium_33_23_07_11_1_52_40.jpeg)
![The Canadian ballot is considerably simpler than the American ballot. Note there is nothing like a c](https://biology-forums.com/gallery/47/medium_262797_12_08_15_1_37_19_221871018.png)