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Figure 3: Age group wise seroconversion or significant rise in HI titer (18-59 years, n=198 and ≥60 years, n=63) (HI titer: Hemagglutination inhibition titer, Seroconversion: A post-vaccination titer ≥1:40 from a pre-vaccination titer <1:10, Significant rise: At least four-fold increase from pre-vaccination titer ≥1:10)

Figure 3: Age group wise seroconversion or significant rise in HI titer (18-59 years, n=198 and ≥60 years, n=63) (HI titer: Hemagglutination inhibition titer, Seroconversion: A post-vaccination titer ≥1:40 from a pre-vaccination titer <1:10, Significant rise: At least four-fold increase from pre-vaccination titer ≥1:10)