Six different doses of Gen Vac B Hbs Ag vaccine were given orally to 6 varied groups (A, B, C, D, E and F) of male swiss albino mice after immunostimulation. Heart protein level in all the experimental groups of mice were studied and compared with controls (group N) and immunostimulated (group I) mice 0n day 1, 3, 4 and 5 of experimental period. Mice treated alone with immunex DS (group I) showed a very high level of protein throughout the experimental period when compared to all the experimental groups (A, B, C, D, E, F, G and H). Mice of groups A (which received the lowest dose of Gene Vac B @ 0.07 ml/mouse) and E (received Gene Vac B @ 0.08 ml/mouse) showed high protein level throughout the experimental period when compared among the experimental groups. However, mice of group A showed heightened protein response compared to group E. 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