Louis Pasteur with Rabies Patients; Source: Wikimedia Commons

This image is originally part of the article What Happens When Cujo Bites: The Low Down on Rabies
Pasteur and Mechnikov, with children treated for rabies.
Photo in the public domain - downloaded from Wikimedia Commons April 18, 2013 –
http://commons.wikimedia.org/wiki/File:Louis_Pasteur_und_Metschnikow.jpg