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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.
Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
Vaccines prevent between 2.5 and 4 million deaths every year.