The average office desk has 400 times more bacteria on it than a toilet.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.
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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
Segregation of B cells and T cells in a lymph node
Pneumonia patient’s chest x-ray. Note the irregular areas of density.