Learn how a caring grownup can help a child cope with pain, discomfort, fear or anxiety as a sample is collected for laboratory testing.
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The flu is a respiratory illness triggered by infection with an influenza virus. Our guide explains the types of flu tests and when and how they may be used.
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Kidney stones are collections of crystals in the urinary tract that cause intense pain. Learn about the types of kidney stone tests and when they may be used.
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