The time required for seroconversion, as determined by the two IFA assays for IgG, IgM and IgA, and by the two IFA assays and ELISA for IgG, was nearly identical among these patients (Fig.1). of the IgG, IgM and IgA responses between patients with or without underlying medical disease, steroid or intravenous immunoglobulin therapy, or […]