American Red Cross canteen staff (1919). Original from Library of Congress. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/2301129/free-photo-image-women-nurse-spanish-fluFree Image from public domain licenseCarpenter and construction worker from Georgia who is recovering from flu (1940). Original from Library of Congress.… https://www.rawpixel.com/image/2301134/free-photo-image-sleep-black-and-white-vintage-photosFree Image from public domain licenseCOVID-19 protection measure guide with ancient Greek painting remix illustration vector banner https://www.rawpixel.com/image/2321279/free-illustration-vector-covid-rules-gods-protection-adviceView licenseCOVID-19 protection measure guide with ancient Greek painting remix illustration psd mockup banner https://www.rawpixel.com/image/2321266/free-illustration-psd-banner-mockup-covid-mask-cloudView licenseSurgical nurse, Herrin Hospital (private), Herrin, Illinois (1939). Original from Library of Congress. Digitally enhanced by… https://www.rawpixel.com/image/2301133/free-photo-image-spanish-flu-hospital-nurseFree Image from public domain licenseOperation, Herrin Hospital (private), Herrin, Illinois (1939). Original from Library of Congress. Digitally enhanced by… https://www.rawpixel.com/image/2301119/free-photo-image-doctor-spanish-flu-historyFree Image from public domain licenseOperation at Herrin Hospital (private), Herrin, Illinois (1939). Original from Library of Congress. Digitally enhanced by… https://www.rawpixel.com/image/2301132/free-photo-image-surgery-medical-spanish-fluFree Image from public domain licenseOperation at Provident Hospital on South Side of Chicago, Illinois (1941). Original from Library of Congress. 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Digitally enhanced by rawpixel. https://www.rawpixel.com/image/2301131/free-photo-image-spanish-flu-nurse-1918Free Image from public domain licenseMan's silhouette wearing a mask with coronavirus contaminated background https://www.rawpixel.com/image/2321556/free-illustration-image-silhouette-covid-poster-background-people-shadowView licenseAmerican Red Cross canteen workers taking food for family infected with the flu, Charlotte, North Carolina (1918). 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