@misc{indiciae3ce9cc04affb,
  title = {Mucosal immunity and vaccination.},
  author = {J Holmgren},
  year = {1991},
  doi = {10.1111/j.1574-6968.1991.tb04964.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1815705/},
  note = {Source identifier: 1815705}
}