@misc{indiciae12ea484dc21c,
  title = {Difficulties in polio eradication.},
  author = {O Razum and J Liyanage and K R Nayar},
  year = {2001},
  doi = {10.1016/s0140-6736(05)71280-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/11273091/},
  note = {Source identifier: 11273091}
}