@misc{indiciaeac250612c5c0,
  title = {Multivalent vaccines: prospects and challenges.},
  author = {R E Spier},
  year = {1997},
  doi = {10.1007/bf02898716},
  url = {https://pubmed.ncbi.nlm.nih.gov/9306653/},
  note = {Source identifier: 9306653}
}