Anti-HBs levels prior (A) to and one month after (B) the second booster vaccination.

<p>Line at GMC. A) The anti-HBs levels in the groups were not significantly different. B) The anti-HBs level in the prophylactic paracetamol group (4257 mIU/mL) is significantly lower (p = 0.048) from the anti-HBs level in the control group (5768 mIU/mL). The anti-HBs level in the therapeutic paracetamol group (4958 mIU/mL) was not significantly different from the control group. Significant differences in anti-HBs levels were tested by using the Mann-Whitney U test. * = p<0.05.