@misc{indiciaef1562847fc78,
  title = {Ending polio immunization.},
  author = {H F Hull and R B Aylward},
  year = {1997},
  doi = {10.1126/science.277.5327.780},
  url = {https://pubmed.ncbi.nlm.nih.gov/9273701/},
  note = {Source identifier: 9273701}
}