@misc{indiciaea87f19c3dabb,
  title = {Vaccination against smallpox.},
  author = {P R Gully and M J Wood and S S Bakhshi},
  year = {1981},
  doi = {10.1136/bmj.282.6257.70-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/6778575/},
  note = {Source identifier: 6778575}
}