@misc{indiciaefff873a6cede,
  title = {Evaluating new vaccines for developing countries. Efficacy or effectiveness?},
  author = {J Clemens and R Brenner and M Rao and N Tafari and C Lowe},
  year = {1996},
  url = {https://pubmed.ncbi.nlm.nih.gov/8569019/},
  note = {Source identifier: 8569019}
}