Chapter 11. Practical Applications of Immunology. Vaccine History. Variolation: Inoculation of smallpox into skin (18th century). Vaccination: Inoculation of cowpox into skin. Herd immunity results when most of a population is immune to a disease.
Practical Applications of Immunology
Figure 18.10 (1 of 2)
Figure 18.10 (2 of 2)
Figures 18.11b, 3.6b