Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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The FDA recognizes 118 routes of administration.
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In 1864, the first barbiturate (barbituric acid) was synthesized.