@misc{indiciae5b3b23e07ceb,
  title = {The rubella immunity gap.},
  author = {W C Marshall and J A Dudgeon and O Stark},
  year = {1979},
  doi = {10.1016/s0140-6736(79)92244-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/87741/},
  note = {Source identifier: 87741}
}