Vaccination against hepatitis B among prisoners in Iran: accelerated vs. classic vaccination.
BACKGROUND
Prisoners and injecting drug users are at constant risk of hepatitis B virus (HBV) infection and the classic 6-months HBV vaccination might not provide immunization rapidly enough. In this randomized clinical trial we investigated the efficacy of an accelerated vaccination protocol vs. classic schedule among prisoners in Iran.


METHODS
180 prisoners were randomized into 2 vaccination groups; group A underwent accelerated vaccination at 0, 1, 4 and 8 weeks and group C were vaccinated at 0, 1 and 6 months. Antibody against Hepatitis-B surface-antigen (anti-HBs) was assessed at baseline, one, two, six and eight months after the first vaccine dose using immunoenzymatic assays. Seroprotection was defined as anti-HBs titer of 10 IU/L or more. Anti-HBc and HBsAg were measured at baseline and 8th month to evaluate new HBV infection and failure of vaccination.


RESULTS
Overall compliance was 100% and 90.4% in groups A and C respectively. While seroprotection rate at one month was significantly higher in group A (22.4%) compared to group C (4.7%), in the 8th month 78.8% and 93.4% seroprotection was achieved in groups A and C respectively (P < 0.002).


CONCLUSIONS
Compared to classic HBV vaccination regimen, an accelerated 0, 1, 4 and 8 weeks vaccination schedule can achieve early seroprotection more rapidly, provides clinically sufficient seroprotection with higher compliance in prisoners and can be suggested in situations that rapid immunization against HBV infection is warranted.
Islamic Azad University, Istahban Branch, Istahban, Iran.
Ali Asghar Zolghadr
AA
Asli
Mohsen
M
Moghadami
Nima
N
Zamiri
Hamid Reza
HR
Tolide-Ei
Seyyed Taghi
ST
Heydari
Seyed Moayed
SM
Alavian
Kamran B
KB
Lankarani
D000328:Adult; D006509:Hepatitis B / Q000517:prevention & control*; D006514:Hepatitis B Surface Antigens / Q000097:blood; D017325:Hepatitis B Vaccines / Q000627:therapeutic use*; D006515:Hepatitis B virus / Q000276:immunology*; D006801:Humans; D007115:Immunization Schedule; D007492:Iran; D008297:Male; D017063:Outcome Assessment, Health Care; D010349:Patient Compliance; D011329:Prisoners; D013997:Time Factors
D006514:Hepatitis B Surface Antigens; D017325:Hepatitis B Vaccines