objective: to compare immunogenicity of a recombinant hepatitis b (hb) vaccine in two groups of neonates born in two cities of iran with different geographic and ethnic backgrounds.   materials and methods: ten micrograms of a recombinant hb vaccine was administered under field condition to iranian healthy neonates at 0, 1.5 and 9 months intervals. the subjects consisted of two groups of 290 an...

BACKGROUND It is known that the immunogenicity of hepatitis B virus (HBV) vaccine is lower in uremic patients than healthy subjects. Numerous inherited or acquired factors have been implicated in this lowered response, and the high frequency of recombinant human erythropoietin use among patients on maintenance dialysis has been suggested to play a pivotal role. However, the impact of therapy wi...

Although the use of recombinant hepatitis B virus surface (HBsAg) protein vaccine has successfully reduced global hepatitis B infection, there are still a number of vaccine recipients who do not develop detectable antibody responses. Various novel vaccination approaches, including DNA vaccines, have been used to further improve the coverage of vaccine protection. Our previous studies demonstrat...

OBJECTIVE To compare two pediatric recombinant hepatitis B vaccines-the Engerix-B reference vaccine and the Euvax-B vaccine-in terms of immunogenicity and reactogenicity, and also to investigate their interchangeability, that is, whether a three-dose hepatitis B vaccination schedule begun with a first dose of Engerix-B could be completed with two doses of Euvax-B. METHODS This study was condu...

Background: Several adjuvants have been evaluated for vaccine formulations but alu-minum salts will continue to be used for many years due to their safety, low cost and adjuvanticity with different antigens. Two commonly used aluminum adjuvants, alumi-num hydroxide and aluminum phosphate have different adjuvanticity properties. Com-mercial recombinant protein hepatitis B vaccines containing alu...

background: hepatitis b is an important infectious disease.  since several years ago, mass vaccination against this viral infection has become as part of routine vaccination schedule of iran.  however, some healthy neonates, children and adults fail to generate a protective antibody response after vaccination. objectives: to investigate distribution of hla class-i and class-ii antigens in healt...

Acute hepatitis A superimposed on chronic liver disease (CLD) has been associated with severe or fulminant hepatitis. An open, multicenter study was performed to compare the safety and immunogenicity of an inactivated hepatitis A vaccine in patients with CLD with that in healthy subjects. A secondary objective was to compare the safety of the hepatitis A vaccine with that of a commercial hepati...

Hepatitis B infection is one of the most deadly diseases causing acute as well as chronic infection to liver which globally affects 5 % of people worldwide. As no specific treatment is available, greatest emphasis is placed on prevention through immunization. Hepatitis B virus (HBV), a member of the hepadnaviridae family, is an envelope, circular, single-stranded, and partially doublestranded D...