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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

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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.

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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.

Discovery of apoptosis in the adrenal cortex by Kerr, Wyllie, and Currie Discovery of apoptosis in the adrenal cortex by Kerr, Wyllie, and Currie
The thyroid gland. The thyroid gland.
The thymus gland. This gland lies in the mediastinum of the thoracic cavity, just above the heart. I The thymus gland. This gland lies in the mediastinum of the thoracic cavity, just above the heart. I
Exocrine gland and Endocrine gland Exocrine gland and Endocrine gland
Hormones associated with the hypothalamus and pituitary gland. Hormones associated with the hypothalamus and pituitary gland.
The pituitary gland. The pituitary gland.
Video: The Lac Operon in E. Coli

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