Small Pox In The Royal Navy During The 5 Years Ended 1882
Average number of men 44,758
(from the Parliamentary Blue Book)

No of cases Class 1 Class 2 Class 3 Mild Mild Mild   Severe Severe Severe Deaths Deaths
  Vaccination not stated Vaccinated once only Vaccinated twice or more Class
1
Class
2

Class
3

Class
1
Class
2
Class
3
Class
1
Class
2
Class
3
86 28 30 28 26 23 17 ... 4 7 2 3 4

THE ARMY AND NAVY --Wallace