Identification of primary and secondary measles vaccine failures by measurement of immunoglobulin G avidity in measles cases during the 1997 São Paulo epidemic - Pannuti, Cláudio S.; Morello, Ricardo José; Moraes, José Cássio de; Curti, Suely Pires; Afonso, Ana Maria S.; Camargo, Maria Cláudia Corrêa; Souza, Vanda A. U. F. de (Clinical and diagnostic laboratory immunology, 2004)