@misc{indiciaeb1c35dfb6ebd,
  title = {Progress in international smallpox eradication.},
  author = {W C Cockburn},
  year = {1966},
  doi = {10.2105/ajph.56.10.1628},
  url = {https://pubmed.ncbi.nlm.nih.gov/5951482/},
  note = {Source identifier: 5951482}
}