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Quantification of anti-PA IgG titers in the serum of B. anthracis-infected NHPs by ELISA. Samples were taken on days 10, 14, 21, 28, 42, and 56 and on each of the 3 days after the last treatment and analyzed for anti-PA IgG titers. Group geometric mean values with 95% confidence intervals are presented for group 1 (TP-271 for 14 days) and group 2 (TP-271 for 21 days).
