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The passage discusses the 1918 influenza pandemic. It was caused by an H1N1 virus of avian origin. While its exact origin is unclear, it spread worldwide from 1918-1919. An estimated 500 million people were infected globally, with deaths estimated at 50 million worldwide and 675,000 in the United States. Mortality was high among those under 5, 20-40 years old, and over 65. The high mortality among healthy young adults was unique to this pandemic. Without vaccines or antibiotics, control efforts were limited

Author

Sơn Thái

Language

EN