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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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The horizontal fraction bar was introduced by the Arabs.
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There are 60,000 miles of blood vessels in every adult human.
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Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.