Single-center Study Evaluating the Safety and Efficacy of Viscogel® as Adjuvant in Act-HIB® Vaccine

Inclusion Criteria: * Subjects who have signed a written informed consent consistent with ICH GCP guidelines and local legislations prior to participation in the trial. * Subjects who are healthy and with no relevant medical history as determined by the investigator. * Subject that has not previously been known to be infected with or vaccinated against HIB, or exposed to patients diseased with HIB within a 4 months period prior to screening. * Male and non-lactating female subjects 22-50 years of age. * Two negative pregnancy tests if female (at screening and day 0) * Contraceptive use if female i.e. using a highly effective contraceptive method (implants, injectables, combined oral contraceptives, intra-uterine devices \[including hormonal intra-uterine devices\], sexual abstinence or vasectomised partner) for at least one month before dosing and willing to use it for at least one month after dosing. * Able to read and write Swedish. Exclusion Criteria: * Known allergy to any component in Act-HIB, or who have had a serious reaction after previous administration of a vaccine. * Fever or acute disease including fever. * Receipt of immunoglobulins or blood products within three months prior to screening. * Donation of blood or suffered of blood loss of 450 ml within 3 months (4 months if female) prior to screening. * Donation of plasma within 14 days prior to screening. * Participation in other clinical study within 3 months prior to screening or previously dosed in this study. * Known or suspected immunodeficiency. * Vaccination received within a 2 months period prior to screening. * Any condition where regular use of inhaled, topical or oral corticosteroid is used. * Any condition where use of immunosuppressant is needed, e.g rheumatoid arthitis, cancer, transplantation, or treatment with immunomodulators, e.g. anti-TNF alpha, methotrexte, thioguanine, cyclophosphamide, cyclosporine, tacrolimus. * Smoker or user of other nicotine products at the discretion of the investigator. * Drug or alcohol abuse or history of drug or alcohol abuse in the past 5 years prior to screening. * Any medical condition or other circumstances that in the opinion of the investigator might interfere with the study. * Abnormal clinically significant laboratory values, ECG findings, vital signs or physical examination findings as judged by the investigator. * Inability to adhere to the protocol including plans to move from the area. * Use of any prohibited medication (including dietary supplements and herbal medication) within 2 weeks or 7 half-lives (whichever is longer) of day 0. * Any positive result at screening for serum hepatitis B surface antigen (HBsAG), hepatitis C antibody (anti-HCV) or human immunodeficiency virus (HIV) I and II.