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Results of in vitro testing by microneutralization assay of CoronaVac-induced neutralizing A) Wild-type strain and B) Alpha-, C) Beta-, and D) Delta-variant SARS-CoV-2 antibodies (n = 207). Overall vaccine-induced neutralizing antibodies shown at baseline, 2–3 weeks, and 10–12 weeks after second dose. Differences in mean inhibition rate were compared based on blood collection times. p value <0.05 indicates statistical significance.
