@misc{indiciae0b63c5e6a7fc,
  title = {Vaccination against whooping-cough.},
  author = {P K Sylvester and J Beal and D Harrison},
  year = {1977},
  doi = {10.1016/s0140-6736(77)91986-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/65601/},
  note = {Source identifier: 65601}
}