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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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Cyanide works by making the human body unable to use oxygen.

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In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

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