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Author Question: Two children ride on a merry-go-round, George is at a greater distance from the axis of rotation ... (Read 50 times) |
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
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People about to have surgery must tell their health care providers about all supplements they take.
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Medication errors are three times higher among children and infants than with adults.