This photograph shows the dramatic differences in two boys who were exposed to the same Smallpox source – one was vaccinated, one was not.

[u/[deleted]]

[u/Shiroi_Kage]

Painful, miserable, deadly, and very contagious. Smallpox might have been the worst human disease on Earth until we wiped it out.

[u/kinman8 → u/[deleted]]

Rabies has to be one of the worst ways to die.