@misc{indiciaece93091c966c,
  title = {Could smallpox come back?},
  author = {R Wittek},
  year = {2004},
  doi = {10.1016/j.ijid.2004.09.001},
  url = {https://pubmed.ncbi.nlm.nih.gov/15491868/},
  note = {Source identifier: 15491868}
}