The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
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By definition, when a medication is administered intravenously, its bioavailability is 100%.
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The average adult has about 21 square feet of skin.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
Diagrams showing the multiple energy shells and orbitals of a nitrogen atom
Solar Energy Input Varies with Latitude
negative feedback loop
Free Energy Enzymes
Negative reading oxygen sensor voltage can be caused by several problems.