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Loss of antibody-protected status based on (A) antibody binding, and (B) viral neutralization in waned participants. (A) All 25 participants demonstrated a loss of anti-RBD binding antibodies; (B) only 13 showed a loss of neutralization potential, signified by an initial non-0 neutralization endpoint titer and an endpoint titer of 0 at the post-waned timepoint. The numbers next to the dots represent the number of overlapping participants with the same neutralizing endpoint titer.
