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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
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.
By definition, when a medication is administered intravenously, its bioavailability is 100%.
There are 20 feet of blood vessels in each square inch of human skin.