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Response to treatment with intravenous immunoglobulin (IGIV) on parvovirus B19 viral load and reticulocyte count. The course of (A) hemoglobin (Hgb), (B) reticulocyte count, and (C) parvoviral load are shown over the first 400 days of life. Arrows indicate doses of IGIV. Abbreviations: ULD, upper limit of detection; LLD, lower limit of detection.
