Acknowledgments
IB Campos received a scholarship from Science without Borders of CNPq (200910/2012-4) to evaluate the quality of the different vaccines at Boston Children’s Hospital. This work was supported by PATH. The authors would like to thank Claudia Fiaschi, Alessandra Cardoso, Raimunda Ferreira, Marilene Barbosa, Izabel Vieira, Nelson Gonzaga for technical support.