Louis Cobbett injecting a hamster with anti-toxin in the Pathology Department of Cambridge University, assisted by Alfred… https://www.rawpixel.com/image/13952321/photo-image-person-hospital-manFree Image from public domain licenseLouis Cobbett and Alfred Clark in the Pathology Department of Cambridge University. Copy photograph, ca. 1960 after the… https://www.rawpixel.com/image/13979277/photo-image-person-clothing-manFree Image from public domain licenseLouis Cobbett, Henry Roy Dean, Howard Walter Florey and Harry Norman Green. Copy photograph, ca. 1960, after the original… https://www.rawpixel.com/image/13984190/photo-image-people-clothing-manFree Image from public domain license