@misc{indiciae6b4233dce3a8,
  title = {Need for smallpox vaccination in high-risk groups.},
  author = {W W Burnside},
  year = {1973},
  doi = {10.1016/s0022-3476(73)80098-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/4698967/},
  note = {Source identifier: 4698967}
}