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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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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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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.