Smallpox pustule gauge, 1870-1930.

Smallpox pustule gauge, c 1920.
Smallpox pustule (or vesicle) gauge used to estimate the duration of immunity imparted by vaccination, by Young, Scottish, 1870-1930
 
Currently on display in:
The Science and Art of Medicine
Year made :
1870-1930
Inventory number :
A600038