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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

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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.

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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.

A large female tiger shark (Galeocerdo cuvier) A large female tiger shark (Galeocerdo cuvier)
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A farm family in Custer, Nebraska, in 1888, a region where Populist sentiment was strong. A farm family in Custer, Nebraska, in 1888, a region where Populist sentiment was strong.
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PCR analysis showing expansion of the CAG repeat region of the HD gene PCR analysis showing expansion of the CAG repeat region of the HD gene
Video: How antibiotics works? 💊

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