Public domain
Cold storage of spotted fever and typhus fever vaccines. Vaccine in large flasks is the finished product waiting to be bottled. USPHS (United States Public Health Service) Rocky Mountain Laboratory, Hamilton, Montana
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineCold storage of spotted fever and typhus fever vaccines. Vaccine in large flasks is the finished product waiting to be bottled. USPHS (United States Public Health Service) Rocky Mountain Laboratory, . 1942-01-01. Vachon, John. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.