@misc{indiciaed3b022d2ab88,
  title = {Smallpox: preparation without inoculation.},
  author = {Kathleen Nelson},
  year = {2003},
  doi = {10.1016/s0140-6736(03)14201-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/12947947/},
  note = {Source identifier: 12947947}
}