https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13989884Edit ImageSaveSaveEditCropCustom TextA cow's udder with vaccinia pustules and human arms exhibiting both smallpox and cowpox pustules. Coloured engraving by J. Pass, 1811.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 935 x 1200 px | 300 dpiLarge JPEG 2726 x 3500 px | 300 dpiBest Quality JPEG 3775 x 4847 px | 300 dpiFree DownloadA cow's udder with vaccinia pustules and human arms exhibiting both smallpox and cowpox pustules. Coloured engraving by J. Pass, 1811.More