Figure 1.

Antibody levels for serotype 6B at vaccination, at 4 to 6 weeks after vaccination, and at 1.5-year follow-up in patients with rheumatoid arthritis (RA) and spondyloarthropathy (SpA) treated with different antiinflammatory drugs. Antibody levels ≥1 mg/L were considered putative protective (short dashed line).

Crnkic Kapetanovic et al. Arthritis Research & Therapy 2013 15:R1   doi:10.1186/ar4127
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