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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.
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.