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Interesting Facts on Instagram: "In 1894, a physician used a microscope to identify a ghost (Hong Kong). In 1894, a deadly plague outbreak struck Hong Kong, spreading fear across Asia. Many still believed disease came from “miasma” — poisonous bad air — rather than microscopic organisms. Swiss-French physician Alexandre Yersin arrived during the crisis and set up a modest laboratory under difficult conditions. Using a microscope, he isolated the bacterium responsible for the outbreak. The pathog