@misc{indiciae90081ea247d4,
  title = {The need for serologic evaluation of immunization programs.},
  author = {A S Evans},
  year = {1980},
  doi = {10.1093/oxfordjournals.aje.a113044},
  url = {https://pubmed.ncbi.nlm.nih.gov/7457465/},
  note = {Source identifier: 7457465}
}