@misc{indiciaec9f61c7401ed,
  title = {Maternal immunization.},
  author = {N A Halsey and D Klein},
  year = {1990},
  doi = {10.1097/00006454-199008000-00010},
  url = {https://pubmed.ncbi.nlm.nih.gov/2235174/},
  note = {Source identifier: 2235174}
}