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Distribution of positive serology values by blood donor region of birth. Results are expressed as signal over cutoff (S/CO) for Ortho, optical density at 450 nm for Hemagen and Wiener, and scores 0 to 6 for InBios. Across all tests, individuals born in Mexico showed the lowest test values and individuals born in South America the highest. ns, P > 0.05; *, P ≤ 0.05; **, P ≤ 0.01; ***, P ≤ 0.001; ****, P ≤ 0.0001.
