This photograph was taken by Dr. Allan Warner in early 1900s at an isolation hospital,Leicester UK. Both the boys were exposed to the same source of small pox. One of them was vaccinated while the other was not. Dr Warner believed that the best way to eradicate fears and misinformation about a vaccine is to show with and without results to the people as a clear evidence. Credits: https://www.instagram.com/p/CLDzcJPBKCR/?igshid=1d0mdt61cj5yx
The picture is excellent in determining whether to vaccinate or subject family members to preventable diseases! Thank you for posting!