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Vaccines prevent between 2.5 and 4 million deaths every year.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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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.