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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.
The average adult has about 21 square feet of skin.
A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.
Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
![Polyps and polyposis. A polyp is a protruding growth from a mucous membrane lining a hollow organ. I](https://biology-forums.com/gallery/47/medium_14755_26_10_12_5_23_54_9689598.jpeg)
![The medical assistant holds the position of the thermometer while the temperature is being obtained.](https://biology-forums.com/gallery/47/medium_665046_06_03_17_1_45_26_262972351.jpeg)