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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.