@misc{indiciaebff37e08008a,
  title = {Exotic infectious diseases: smallpox.},
  author = {W Nicol},
  year = {1980},
  doi = {10.1177/146642408010000202},
  url = {https://pubmed.ncbi.nlm.nih.gov/6992193/},
  note = {Source identifier: 6992193}
}