@misc{indiciae8b4993f09ef9,
  title = {Haemorrhagic smallpox.},
  author = {A W Downie and D S Fedson and L Saint Vincent and A R Rao and C H Kempe},
  year = {1969},
  doi = {10.1017/s0022172400042078},
  url = {https://pubmed.ncbi.nlm.nih.gov/4311573/},
  note = {Source identifier: 4311573}
}