Figure 3.

Proportion (%) of patients with positive immune response, that is seroconversion (defined as prevaccination titers <10 and postvaccination HI titers ≥40 or a ≥4-fold increase in HI titers), in different treatment groups stratified according to the number of doses of vaccine. HI, hemagglutination inhibition.

Kapetanovic et al. Arthritis Research & Therapy 2014 16:R2   doi:10.1186/ar4427
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