340 Clinical Trials for Various Conditions
Adolescent girls and young women (AGYW) between the ages of 15-24 years continue to bear the brunt of Human Immunodeficiency Virus (HIV) infections in South Africa despite progress recorded in prevention and treatment programmes. The ongoing susceptibility of young women to HIV infection and the sub-optimal uptake of prevention options such as Pre-Exposure Prophylaxis (PrEP) that are highly effective creates a need for an HIV vaccine to benefit populations at substantial risk of HIV infection. However, lessons from previous vaccine studies and the recent COVID-19 vaccine have highlighted significant barriers to vaccine uptake, such as widespread misinformation and vaccine hesitancy. These challenges threaten the successful implementation of a future HIV vaccine. Building on these insights, this study will utilise psychological inoculation theory to develop and evaluate HIV vaccine messages among adolescent girls and young women. Primary objective: To compare changes in intentions to receive HIV vaccine following misinformation exposure in groups with and without psychological inoculation and behavioural economics boost. Secondary objectives: (1) To compare believability and persuasiveness of misinformation claims and motivational threat associated with misinformation in groups with and without psychological inoculation and behavioral economics boost. (2) To explore subgroup effects by relevant sociodemographic and behavioural factors including HIV risk, PrEP history, COVID-19 vaccine history, general vaccine hesitancy, and information avoidance. The investigators will conduct a three-arm randomized controlled trial of 2-3 inoculation messages that address emerging myths and misinformation about the HIV vaccine in South Africa. Participants will be randomly assigned to a control group or one of two intervention arms: (1) inoculation message arm, or (2) enhance inoculation message with insights from behavioural economics.
This study will evaluate the safety and tolerability (including reactogenicity) of candidate vaccine A244/B.63521 with Army Liposome Formulation (ALF) mixed with the saponin QS-21(Quillaja saponaria-21) (ALFQ) adjuvant. The purpose of this phase I randomized, double-blind clinical trial is to optimize vaccine adjuvant ALFQ dosing by assessing safety, reactogenicity, and immunogenicity. Safety and tolerability will be assessed with both clinical and laboratory monitoring. Sixty human immunodeficiency virus (HIV) negative participants will be enrolled to one of three arms. Vaccinations via intramuscular (IM) injection will occur at months 0, 1, and 2. All participants will receive A244 and B.63521 (300 micrograms of each). In addition, Arm 1 will receive 200 micrograms of ALFQ. Arm 2 will receive 100 micrograms of ALFQ. Arm 3 will receive 50 micrograms of ALFQ.
The purpose of the study is to evaluate the safety, tolerability, and immunogenicity of polyvalent env (A,B,C,A/E)/gag (C) DNA and gp120 (A,B,C,A/E) protein vaccines (PDPHV201401) co-administered together with or without adjuvant in repeated doses in healthy, HIV-uninfected adults
The purpose of this study is to evaluate the safety, tolerability, and immunogenicity of env (A,B,C,A/E)/gag (C) DNA and gp120 (A,B,C,A/E) protein/GLA-SE HIV-1 vaccines (PDPHV-201401) as a prime-boost regimen or co-administered in repeated doses, in healthy, HIV-1-uninfected adults.
The purpose of this study is to evaluate the safety, tolerability, and immunogenicity of an HIV vaccine (gp145 C.6980) with aluminum hydroxide adjuvant in healthy, HIV-1-uninfected adults in the United States.
The purpose of this study is to test experimental human immunodeficiency virus (HIV) vaccines that use an adenovirus vector. The adenovirus vector may help the vaccines stimulate an immune response. Researchers want to see how the immune system will respond to these vaccines as well as if they are safe to give to people. Participants cannot get HIV from these vaccines. However, researchers also want to see if the vaccine's adenovirus is contagious. Adenoviruses cause cold symptoms or mild eye infections, therefore household and intimate contacts will be asked to participate as well.
The purpose of this study is to evaluate the safety and immune response to three DNA vaccines and a MVA-CMDR vaccine that may boost the immune response to the DNA vaccines in healthy, HIV-uninfected adults.
The primary objective is to compare \& evaluate between the treatment groups the changes in decline/reduction of HIV viral load \& increase changes in WBC white blood cell counts in the adult Remune dose vs the low dose Remune placebo groups. Additional objectives include changes in CD4+ \& CD8+ T cell counts along with increased HIV immunity.
The purpose of this study is to assess the safety and tolerability of Modified Vaccinia Ankara (MVA) Mosaic vaccine in healthy adult participants.
Background: - Vaccines create resistance to disease. This study tests experimental human immunodeficiency virus (HIV) vaccines that use an adenovirus as a transporter. Transporters may help vaccines stimulate an immune response against HIV. This means the body works to fight infection. Researchers want to see if different ways of giving the vaccines cause different immune responses. They also want to see if the vaccines adenovirus is contagious. Adenoviruses cause cold symptoms or mild eye infections. Participants cannot get HIV from these vaccines. But they can get the adenovirus, so their entire household and intimate contacts must participate. Objective: - To test the safety of experimental HIV vaccines. Eligibility: - Healthy adults 18-49 years old. Design: * Participants will be screened with medical history, physical exam, and blood and urine tests. * Participants will receive the vaccine 3 times over 6 months. Each time, they will have a physical exam and blood and urine tests. Samples will be taken from their nose, rectum, and cervix. * Some participants will receive the vaccine by swallowing 11 capsules with water. Clinic staff will observe them for 1 hour. * Some participants will receive the vaccine swabbed in their throat. They will get dose 1 at the hospital and stay there for 1 week. They will have medical tests and nose swabs. Doses 2 and 3 will not require a hospital stay. * Participants will have 7 follow-up visits over 6 months, with a physical exam and blood tests. Samples will be taken from their nose, throat, and rectum. * Household and intimate contacts will have 4 clinic visits over 8 months, with a physical exam and blood tests.
NOTE: This study has stopped enrolling new participants, and all study vaccinations for currently enrolled participants have been stopped. Currently, there are no vaccines approved for the prevention of HIV infection, but there are many clinical trials taking place that are studying experimental HIV vaccines. The purpose of this study is to evaluate the safety and tolerability of three different HIV vaccine schedules in healthy, HIV-uninfected adults.
Some vaccines may work better when given together with another substance known as an adjuvant or when given with an experimental procedure called electroporation (EP). EP is a method where an electric pulse is administered to the same muscle where the vaccine injection is given. The addition of the adjuvant to the vaccine and the delivery with EP may increase a person's immune response to the vaccine. Combination approaches such as a DNA vaccine followed by live vector boost may also increase a person's immune response to the vaccine components. All of these interventions will be tested in this study. This study will evaluate the safety and tolerability of and immune response to an HIV DNA vaccine with or without plasmid IL-12 adjuvant, when given by EP and followed by a live vector vaccine given IM by needle and syringe in healthy, HIV-uninfected adults.
This study will test the safety and immune responses of a prime-boost regimen of two HIV vaccines- a DNA vaccine followed by a modified vaccinia Ankara (MVA) vaccine- in healthy, HIV-uninfected, vaccinia-naive adults.
The purpose of this study is to evaluate the immune response to the Vaccine Research Center (VRC) rAd5 HIV vaccine when the vaccine components are administered in three different ways, in healthy, HIV-uninfected adults.
The purpose of this study is to evaluate the safety and immune response to an HIV vaccine in HIV-uninfected adults. Study researchers will also determine the maximum dose of the vaccine that participants can safely receive.
This is an extension of the HVTN 073/SAAVI 102 study. This study will evaluate the safety and immune response to an HIV envelope protein vaccine boost in people who have previously received the SAAVI DNA-C2 and SAAVI MVA-C vaccines or placebo in the HVTN 073/SAAVI 102 study.
Background: The primary focus of the Vaccine Research Center (VRC) at the NIH is to develop vaccines for HIV/AIDS. The main purpose of this study is to look in detail at the body s immune response to two experimental HIV vaccines currently in development at the VRC. One is known as the rAd5 vaccine and the other is known as the DNA vaccine. These vaccines are made with pieces of manufactured DNA. They do not contain live or killed HIV. It is impossible for study vaccines to give you HIV and they cannot cause you to give HIV to someone else. Both of these experimental vaccines have been given to people before in other research studies. They have not been approved for treating or preventing HIV infection. Purpose: The main purpose of this study is to look in detail at the body s immune responses after the experimental HIV vaccines are given and to assess safety of the study vaccines. Eligibility: Healthy volunteers between the ages of 18 and 50 who are not infected with HIV and who meet the eligibility requirements. Design: Participants will be screened with a medical history (including questions about sexual history and drug use), physical exam, and blood tests. The study will have two groups: \<TAB\>One group will receive one injection of the rAd5 vaccine, and have 8 clinic visits over 3 months. \<TAB\>The second group will have three injections of the DNA vaccine, one injection of the rAd5 vaccine, and have 12 clinic visits over 6 months. All participants will be asked to provide blood and body fluid samples for testing during the study. Payment for participation will be provided....
The purpose of this study is to evaluate the safety and immune response to an HIV vaccine in healthy, HIV-uninfected adults who have participated in a previous HIV vaccine clinical trial and in healthy, HIV-uninfected adults who have not participated in a previous HIV vaccine clinical trial.
The purpose of this study is to evaluate the safety of and immune response to an HIV vaccine, administered using two different devices, followed by a vaccine boost, in healthy, HIV-uninfected adults.
This study is designed to determine whether administration of the GSK Biologicals HIV vaccine 732462 can lead to a reduction in viral load, and impact on the course of human immunodeficiency virus type 1 (HIV-1) infection. In HIV-1 infected persons who have not yet started antiretroviral therapy (ART), such a vaccine would potentially lead to a delay in the initiation of treatment.
The purpose of this study is to evaluate the safety and tolerability of Ad26.ENVA.01 and Ad35-ENV in low-risk for HIV-uninfected healthy adults administered in heterologous and homologous prime-boost regimens at different time intervals.
The purpose of this study is to evaluate the safety and immune response of an adenovirus-based HIV vaccine in HIV-uninfected adults.
The purpose of this study is to evaluate the safety and immune response of an adenovirus-based HIV-1 vaccine regimen that includes two vaccines given at different time points in HIV-uninfected adults.
The purpose of this long-term follow-up study is to assess the long-term health status of HIV-infected subjects who previously participated in GSK-sponsored trials evaluating the investigational HIV vaccine 732462. This study will provide additional data concerning the long-term benefits/risks associated with vaccination. No vaccine will be administered during the study period. Vaccines were administered during the primary studies.
The purpose of this study is to examine the role of genetics in determining the immune response to an HIV vaccine in pairs of HIV-uninfected twins.
The purpose of this study is to evaluate the safety and immunogenicity of Ad35-GRIN/ENV HIV vaccine and Ad35-GRIN HIV vaccine administered intramuscularly at 0 and 6 months.
The goal of the proposed study is to use the HBV vaccine as a model for a future HIV vaccine trial, examining the efficacy of community-based outreach intervention as well as an accelerated vaccine schedule as a method for increasing acceptance/adherence with HBV vaccination protocols among not-in-treatment drug users. This study will also examine the effect of HBV vaccination coupled with community-based outreach intervention on reducing the incidence of HIV, HBV and HCV infections and the frequency of needle use and sexual risk behaviors related to these viral transmissions. A secondary purpose will be to assess the antibody response after HBV vaccination as a measurement of immunological response in drug users.
The purpose of this study is to test the effects of different persuasive informational messages on rates of rapid HIV testing and willingness to participate in a HIV vaccine clinical trial. Adult African-American, non-Latina White, and Latina women will be recruited. Women will initially be randomized to 4 groups: 1. no message control; 2. 1-sided message that mentions benefits of HIV testing; 3. 2-sided message that acknowledges minor opposition to testing, then refutes the opposition; and 4. 2-sided message that acknowledge stronger opposition to testing, then refutes the opposition. Women will be offered HIV testing, then re-randomized to a similar set of 4 messages related to HIV vaccine trials. There will therefore be 16 groups in total (4 X 4).
Vaccines have been very successful in preventing viral infections such as hepatitis B and the measles. Viral vaccines work by causing a person's immune system to make cells that will work against the virus. Due to the success in treating other viral infections, scientists are trying to develop a vaccine for human immunodeficiency virus (HIV). HIV infection is the cause of acquired immune deficiency syndrome (AIDS). AIDS is one of the most serious viral infections we know. This is a research study to evaluate the safety of a possible vaccine against HIV. Researchers want to determine that a person's immune system can respond to the HIV before he or she is exposed to it. Therefore that person may be able to be protected from infection with HIV.
The purpose of this study is to evaluate the safety of and immune response to an experimental DNA HIV vaccine followed by boosting with an experimental modified vaccinia HIV vaccine (MVA) in HIV uninfected adults.