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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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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.

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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

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