@misc{indiciae8487db2ca8c4,
  title = {Immunization against smallpox before Jenner.},
  author = {W L Langer},
  year = {1976},
  doi = {10.1038/scientificamerican0176-112},
  url = {https://pubmed.ncbi.nlm.nih.gov/766184/},
  note = {Source identifier: 766184}
}