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. 2016 Apr 19;7(2):e00417-16. doi: 10.1128/mBio.00417-16

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Copyright © 2016 Memoli et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.

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FIG 7 — HAI and NAI titer responses postchallenge. (A) HAI titer on day 0 (prechallenge) and week 8 (postchallenge) in the participants in the low- and high-HAI-titer groups. (B) Approximately 50% of those in the low-HAI-titer group demonstrated no significant HAI response postchallenge. (C) All participants with a low NAI titer prechallenge demonstrated a significant rise in NAI titer 8 weeks postchallenge. Each symbol represents the value for an individual participant. Horizontal lines represent geometric means with 95% confidence intervals indicated by the error bars. Dotted lines represent the lower limit of detection.