@misc{indiciaec98978512ed8,
  title = {From the Expanded Programme on Immunization (EPI) database: diphteria.},
  author = {World Health Organization WHO. Expanded Programme on Immunization EPI},
  year = {1998},
  url = {https://pubmed.ncbi.nlm.nih.gov/12179910/},
  note = {Source identifier: 12179910}
}