@misc{indiciaed14fbfa70d15,
  title = {When do we stop vaccinating against smallpox?},
  author = {W S Millar},
  year = {1977},
  doi = {10.1136/bmj.2.6087.639-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/902017/},
  note = {Source identifier: 902017}
}