Virus Outbreak 1918 Influenza COVID 19

FILE - In this 1918-1919 photo made available by the Library of Congress, a conductor checks to see if potential passengers are wearing masks in Seattle, Wash. During the influenza epidemic, masks were required for all passengers. (Library of Congress via AP, File) AP PROVIDES ACCESS TO THIS PUBLICLY DISTRIBUTED HANDOUT PHOTO PROVIDED BY LIBRARY OF CONGRESS; MANDATORY CREDIT

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