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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.