Active clinical trials for "Dengue"

This study will evaluate the ability of a single dose of the live attenuated recombinant tetravalent dengue vaccine TetraVax-DV-TV005 (referred to as TV005) to protect against infection with rDEN3Δ30, an attenuated DENV-3, when administered 6 months after the TV005 vaccine.

The purpose of this study is to assess the neutralizing antibody response against each dengue serotype post-vaccination.

The aim of the trial was to assess the efficacy of the CYD dengue vaccine in preventing symptomatic, virologically-confirmed dengue (VCD) cases. Primary Objective: To assess the efficacy of CYD dengue vaccine after 3 vaccinations at 0, 6, and 12 months in preventing symptomatic VCD cases, regardless of the severity, due to any of the four serotypes in children aged 2 to 14 years at the time of inclusion. Secondary Objectives: To describe the efficacy of CYD dengue vaccine in preventing symptomatic VCD cases after the third dose to the end of the Active Phase, after at least 1 dose, and after 2 doses. To describe the occurrence of serious adverse events (SAEs), including SAEs of special interest in all participants throughout the trial period. To describe the occurrence of hospitalized virologically-confirmed dengue (VCD) cases and the occurrence of severe (clinically-severe or as per World Health Organization (WHO) criteria) VCD cases, throughout the Surveillance Expansion period (SEP) and throughout the trial (from Day 0 to the end of the study). To describe the antibody response to each dengue serotype after Dose 2, after Dose 3, and 1 and 5 years after Dose 3.

The purpose of this study was to demonstrate that different CYD dengue vaccine lots manufactured using the same method and in the same location but at different times produce an equivalent immunological response after 3 doses. Primary Objective To demonstrate that three different Phase III lots of CYD dengue vaccine induce an equivalent immune response in terms of post-Dose 3 geometric mean titers (GMTs) against the four parental serotypes. Secondary Objectives: To demonstrate that data from one Phase II lot and pooled data from Phase III lots of CYD dengue vaccine show an equivalent immune response in terms of post-Dose 3 GMTs against the four parental serotypes. To describe the safety of the CYD dengue vaccine in all participants after each dose.

The aim of this study was to evaluate the administration of CYD dengue vaccine serotypes (1, 2, 3 and 4) following a compressed schedule in 3 different populations. Primary Objectives: To describe the humoral immune response to each of the 4 parental dengue virus serotypes at baseline and 28 days after CYD dengue vaccine Dose 3 in Group 1 (Month [M] 13) and Group 2 (M07), irrespective of whether or not Yellow Fever (YF) vaccine has been previously administered. To describe the persistence of the humoral immune response to each of the 4 parental dengue virus serotypes 6 months after CYD dengue vaccine Dose 3 in Group 1 (M18) and Group 2 (M12), irrespective of whether or not YF vaccine has been previously administered. Secondary Objective: To describe the humoral immune response to each of the 4 parental dengue virus serotypes at baseline and 28 days after CYD dengue vaccine Dose 1 and Dose 2 in Groups 1 and 2, irrespective of whether or not YF vaccine has been previously administered. To describe the humoral immune response to each of the 4 parental dengue virus serotypes at baseline and 28 days after CYD dengue Dose 1 in the combined YF-participants in Group 1 (N=60) and Group 2 (N=60), and in Group 3 (N=120). To describe by FV status at baseline the humoral immune response to each of the 4 parental dengue virus serotypes at baseline and 28 days after each injection of CYD dengue vaccine in Groups 1, 2, and 3. To describe the safety profile after each injection of CYD dengue vaccine and/or YF vaccine.

The purpose of this study is to assess the safety of Takeda's Tetravalent Dengue Vaccine Candidate (TDV) (previously DENVax) in healthy adults when given as either a subcutaneous (SC) or intradermal (ID) injection at two dose levels (low and high). The vaccine will be given as two doses 90 days apart. Safety assessments include injection site evaluation and adverse events. The immune response generated after vaccination will be assessed up to 9 months after the first vaccination.

The purpose of this study is to test the safety and immune response to a live attenuated dengue vaccine that could protect people against all 4 types of dengue virus. Live attenuated means that while this vaccine contains 4 live dengue viruses the viruses have been attenuated (weakened) so as not to cause dengue disease in people. Dengue virus is spread to people by mosquitoes and can cause sickness and even death. Seventy-two subjects between the ages of 18-45 years old will be enrolled in this research study at Saint Louis University Center for Vaccine Development. Participants will be randomly assigned to 1 of 4 groups to receive 2 doses of the study vaccine or placebo (inactive substance). Study procedures include: maintaining a diary to record temperature and side effects, physical exam, electrocardiogram (ECG) (measures the activity of the heart), and blood samples. Participants will be involved in study related procedures for about 10 months.

The purpose of this study is to investigate the potential for co-administration of the first dose of CYD Dengue vaccine with childhood vaccination. Primary Objectives: To describe the safety of CYD Dengue vaccine after each dose; first dose given alone or coadministered with childhood vaccines. Secondary Objectives: To describe the immunogenicity of CYD Dengue vaccine after each dose; first dose given alone or co-administered with childhood vaccines.

Retrospective data in children with dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS), and in adults with dengue fever (DF), suggested a lack of benefit from prophylactic platelet transfusion for severe thrombocytopenia in dengue patients without bleeding. However, in Taiwan and Singapore, platelet transfusion was given to 13-50% of hospitalised dengue patients. This is a prospective randomised study to examine the safety and efficacy of prophylactic platelet transfusion in adults with dengue and severe thrombocytopenia without bleeding. The hypotheses are: Prophylactic platelet transfusion is safe in hospitalised dengue patients with severe thrombocytopenia. Prophylactic platelet transfusion is effective in preventing bleeding in hospitalised dengue patients with severe thrombocytopenia.

Dengue fever, which is caused by dengue viruses, is a major health problem in tropical and subtropical regions of the world. The purpose of this study is to test the safety of and immune response to a new dengue virus vaccine in healthy adults.