@misc{indiciae165b827f39c9,
  title = {Smallpox vaccination revisited.},
  author = {Christopher L Sibley},
  year = {2002},
  doi = {10.1097/00000446-200209000-00031},
  url = {https://pubmed.ncbi.nlm.nih.gov/12394015/},
  note = {Source identifier: 12394015}
}