Building One was a three-story red brick building with several small, one-story buildings in the rear for animals and storage. Finished in 1928 by state of Montana, the building was bought by federal government in 1932 for the U.S. Public Health Service’s Rocky Mountain Laboratories.

Image: Office of NIH History and Stetten Museum, 1527

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This photo taken in June 1937 showed Building One’s walk-in refrigerator full of RMSF vaccine vials.

Image: RML, 692