@misc{indiciae5b79642dc9af,
  title = {Mass vaccination: when and why.},
  author = {D L Heymann and R B Aylward},
  year = {2006},
  doi = {10.1007/3-540-36583-4\_1},
  url = {https://pubmed.ncbi.nlm.nih.gov/16989261/},
  note = {Source identifier: 16989261}
}