@misc{indiciae6476b71f7587,
  title = {Smallpox vaccination.},
  author = {E A Piszczek and G F Lull and E L Stebbins and J Adriani and O K Niess},
  year = {1972},
  doi = {10.1001/jama.1972.03210090065041},
  url = {https://pubmed.ncbi.nlm.nih.gov/4678072/},
  note = {Source identifier: 4678072}
}