@misc{indiciaecaaed78b8f0f,
  title = {Problems in developing a respiratory vaccine.},
  author = {T W Chang},
  year = {1970},
  doi = {10.1056/nejm197012032832311},
  url = {https://pubmed.ncbi.nlm.nih.gov/5476483/},
  note = {Source identifier: 5476483}
}