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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.