File:SheMayLookCleanBut.jpg

Summary
Source URL: http://www.nlm.nih.gov/exhibition/visualculture/infectious21.html   *****

Believed to be in the public domain per the source URL. Dated "c. 1940" on the source website, but more likely to be somewhere from 1942 to 1945 due to the last line of text, "You can't beat the Axis if you get VD". Believed to be a work of a US Government agency.