Immunization, vaccines: past and future.

@article{Hochman2011ImmunizationVP,
  title={Immunization, vaccines: past and future.},
  author={Gilberto Hochman and Sanjoy Bhattacharya},
  journal={Ciencia & saude coletiva},
  year={2011},
  volume={16 2},
  pages={372-3}
}