ABSTRACT
Background Nha Trang Institute of Vaccines Medical Biologicals has produced successfully vaccine for human influenza A/H5N1 in embryonic chicken eggs. Effectiveness of the vaccine immune response is highly dependent on the type of adjuvant used.\r\n', u'Objective: To study adjuvants for preparing A/H5N1 influenza vaccine.\r\n', u'Subjects and methods: The study used a comparative approach on capacity to increase the immune response of various adjuvants AIPO4, Chitosan and Freund tested in mice. Experiment of erythrocyte agglutination reaction is used to measure levels of antibody response in mice blood. The process of weight gain in mice after injection of vaccine adjuvant mixture is monitored.\r\n', u'Results: HA antibody level of the vaccine adjuvant mixture is higher than of the vaccine without adjuvant. Capacity of stimulating immune response of Chitosan adjuvant is higher than AlPO4. Repeat injection on day 20th is suitable for vaccine with AlPO4or vaccine without adjuvant. Repeat injection is after day 20th for vaccine with Chitosan or Freund depending on the amount of residual antibody in the blood. \r\n', u'Capacity of stimulating immune response of Freund adjuvant is the best in the 3 adjuvants but the safety of this adjuvant is low\r\n', u' Freund adjuvant should be used only for animals. When using Freund adjuvant to induce immunity to animals it should determine the amount of antibodies causing immune before repeating.\r\n', u'Conclusion: Freund adjuvant should be used only for animals. \r\n', u'\r\n', u'