About the Authors

Carla R. Couto

Affiliation Virology Laboratory (LIM 52 - HCFMUSP), Institute of Tropical Medicine, University of São Paulo, São Paulo, Brazil

Cláudio S. Pannuti

Affiliation Virology Laboratory (LIM 52 - HCFMUSP), Institute of Tropical Medicine, University of São Paulo, São Paulo, Brazil

José P. Paz Jr

Affiliation Virology Laboratory (LIM 52 - HCFMUSP), Institute of Tropical Medicine, University of São Paulo, São Paulo, Brazil

Maria C. D. Fink

Affiliation Virology Laboratory (LIM 52 - HCFMUSP), Institute of Tropical Medicine, University of São Paulo, São Paulo, Brazil

Alessandra A. Machado

Affiliation Virology Laboratory (LIM 52 - HCFMUSP), Institute of Tropical Medicine, University of São Paulo, São Paulo, Brazil

Michela de Marchi

Affiliation Virology Laboratory (LIM 52 - HCFMUSP), Institute of Tropical Medicine, University of São Paulo, São Paulo, Brazil

Clarisse M. Machado

clarimm@usp.br

Affiliation Virology Laboratory (LIM 52 - HCFMUSP), Institute of Tropical Medicine, University of São Paulo, São Paulo, Brazil

Competing Interests

CC and JP received grants from Aventis Pasteur. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: CM. Performed the experiments: CC JP MF AM MdM. Analyzed the data: CM CC. Contributed reagents/materials/analysis tools: CM CP. Wrote the paper: CC CM.