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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.

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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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Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

The tarsier is a haplorhine, and may represent an evolutionary bridge between lower and higher prima The tarsier is a haplorhine, and may represent an evolutionary bridge between lower and higher prima
Results from sequential study of two cohorts tested at three ages and at three different points in t Results from sequential study of two cohorts tested at three ages and at three different points in t
Toussaint L’Ouverture leads a revolt of slaves against the French in Haiti—the first and only major Toussaint L’Ouverture leads a revolt of slaves against the French in Haiti—the first and only major
Adults in the middle-aged group (37–42 years) score higher on measures of generativity than either ... Adults in the middle-aged group (37–42 years) score higher on measures of generativity than either ...
The main avenue to the upward social mobility reviewed in the text has been higher education. The main avenue to the upward social mobility reviewed in the text has been higher education.
The CHRIS manual entry for toluene. Useful information includes response information, chemical and ... The CHRIS manual entry for toluene. Useful information includes response information, chemical and ...
Video: Mendel's Principles of Inheritance (Father of Genetics)

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