@article{Esparza2020Early,
author = {Esparza, José and Lederman, Seth and Nitsche, Andreas and Damaso, Clarissa R.},
title = {Early smallpox vaccine manufacturing in the United States: Introduction of the “animal vaccine” in 1870, establishment of “vaccine farms”, and the beginnings of the vaccine industry},
journal = {Vaccine},
volume = {38},
number = {30},
pages = {7},
year = {2020},
doi = {10.1016/j.vaccine.2020.05.037}
}