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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
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.
Did you know?
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.