As the post-booster titers against BA.1 and BA.2 were quite similar, this reduction was mainly due to higher pre-booster titers against BA.2 antigen, although such pre-booster titer difference between BA.1 and BA.2 did not reach statistical significance.
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The sentences
Both B.1.351 and B.1.617 LNP-mRNA groups showed a trend of higher binding and neutralizing titers than WT group.