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Did you know?
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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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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Vaccines prevent between 2.5 and 4 million deaths every year.
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There are more nerve cells in one human brain than there are stars in the Milky Way.