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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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There are approximately 3 million unintended pregnancies in the United States each year.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.