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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.