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Asthma cases in Americans are about 75% higher today than they were in 1980.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.