https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13959961Edit ImageSaveSaveEditCropCustom TextBack of head showing skin disease. Coloured stipple engraving by S. Tresca after Moreau-Valvile, c. 1806.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 820 x 1200 px | 300 dpiLarge JPEG 2298 x 3364 px | 300 dpiFree DownloadBack of head showing skin disease. Coloured stipple engraving by S. Tresca after Moreau-Valvile, c. 1806.More