@misc{indiciae19b37ce7fa4e,
  title = {Smallpox vaccination.},
  author = {W Vella},
  year = {1972},
  doi = {10.1136/bmj.3.5822.353-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/5046520/},
  note = {Source identifier: 5046520}
}