This study was supported by CNPq, MCT and FAPESP projects 00/04205-06 and 00/11511-06-VGDN program. ELD and PMAZ hold a PQ-CNPq scholarship. CMR and FLM hold a CAPES scholarship; Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Bel?m, PA, Brasil.; Universidade de S?o Paulo. Instituto de Ci?ncias Biom?dicas. Departamento de Micobiologia. Laborat?rio de Virologia Clinica. S?o Paul...