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Reciprocal titer PRNT80 values evaluated for two individual samples (Positive, Negative) as well as pooled plasma positive (CCPP) and negative pooled plasma (NHPP) control samples. Data show intraday (A), interday (B), and interoperator (C) variability. Panel D represents PRNT80 values from all qualification runs combined. Dashed line respresents lower limit of detection.
