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. 2016 Jun 21;6:27251. doi: 10.1038/srep27251

Figure 2.

Figure 2

(a) The relative risks of response to HBV vaccine between adults age ≥40 and adults age <40. (b) The relative risks of response to HBV vaccine between adults age ≥40 and adults age <40. Comparing with adults age <40, the RRs show decreased response to HBV vaccine among adults age ≥40 in cohort and overall studies.