Latin vaccinus, from vacca “cow” because of
early use of cowpox virus against smallpox.
I remember the massive Sabin oral vaccine
for polio first developed by Jonas Salk.
Vaccines stimulate the production of antibodies
provide immunity against one or several diseases
using disease to treat without inducing disease.
“Our greatest responsibility,” said Dr. Salk Vaccine,
“is to be good ancestors.” We too
use our life to inoculate against life.