16 Clinical Trials for Various Conditions
Over the past decade, avian influenza (AI) has become a major health concern. The development of safe and effective vaccines against avian strains that infect people is important. The purpose of this study is to determine the safety of and immune response of an investigational AI vaccine in healthy adults against the H7N3 strain of avian influenza.
Over the past decade, avian influenza (AI) has become a major health concern. The development of safe and effective vaccines against avian strains infecting people is important. The purpose of this study is to determine the safety of and immune response to a new AI vaccine in healthy adults against the H7N3 strain of avian influenza.
This study is will gather critical information on the safety, tolerability, and the immunogenicity (capability of causing an immune response) of A/H5N1 (Bird flu) virus vaccine in healthy adults. Up to 400 healthy adults, aged 18 to 64, will participate. Each subject will participate for about 7 months and will be randomly placed in one of several different study groups receiving a different dose of vaccine or placebo. All subjects will receive two injections of their assigned study product, about 28 days apart, in the muscle. Subjects will keep a journal of their temperature and any adverse effects between study visits. A small amount of blood will also be drawn before the first injection, 7 days after each injection, 1 month after the first injection, and 1 and 6 months after the second injection.
This is a Phase 2, randomized, multi-center study in approximately 300 adults who received 2 doses of aH5N1c or placebo in and completed the parent study V89_18 in the \<65 years of age cohort. The study investigates whether two priming doses of MF59-adjuvanted H5N1 cell culture-derived vaccine (aH5N1c) followed by one or two booster vaccinations with a MF59-adjuvanted H5N6 cell culture derived vaccine (aH5N6c) 3 weeks apart elicit immune responses to the antigens used for priming (H5N1) and boosting (H5N6) after first and second heterologous booster vaccination. Eligible subjects, who received 2 doses of aH5N1c in the parent study V89_18 are randomized in a 1:1 ratio to receive either two aH5N6c vaccinations, 3 weeks apart (group 1) or an aH5N6c vaccination on Day 1 and saline placebo on Day 22 (group 2). Eligible subjects, who received placebo in the parent study will receive two aH5N6c vaccinations, 3 weeks apart (group 3). After the second vaccine administration, subjects are monitored for approximately 6 months for safety and antibody persistence. The total study duration will be approximately 7 months per subject.
The main purpose of this study is to assess the ability of H5 influenza virus vaccines and adjuvants present in the National Pre-Pandemic Influenza Vaccine Stockpile (NPIVS) to generate an immune response to homologous and to antigenically distant heterologous H5 influenza virus strains. The study is designed to evaluate the safety and immunogenicity of vaccination strategies with homologous or antigenically distant heterologous H5 influenza virus vaccines administered with AS03 or MF59 adjuvant.
The main purpose of this study is to assess the safety and ability of a Panblok H7 influenza vaccine adjuvanted with AS03 or MF59 to generate an immune response after 2 doses separated by 28 days. Three different antigen dose levels of Panblok H7 will be tested.
The purpose of this study is to demonstrate the safety and immunogenicity of an oral vaccine to prevent avian influenza. Volunteers will receive either one or two doses of research vaccine or placebo as part of this study.
Background: - New vaccines against avian influenza, also known as "bird flu," are being developed and require testing to determine if they are safe and effective and whether they have any side effects. Researchers are interested in testing two experimental avian influenza vaccines to see whether they are safe, if there are any side effects from the vaccines, and how the body's immune response differs in response to different vaccination schedules. One vaccine is an inactivated vaccine (made with killed or weakened influenza) and one is a DNA vaccine that allows the body to use vaccine to make an immune system response to a specific part of an avian influenza protein. Objectives: * To determine the safety and potential side effects of two experimental vaccines against avian influenza. * To evaluate whether the time between the two experimental vaccine injections affects the immune response to the vaccine. Eligibility: - Healthy individuals between 18 and 60 years of age. Design: * Participants will be randomly divided (by chance) into six groups to receive two injections of vaccine at different intervals. One group will receive only the inactivated vaccine, while the other groups will receive the DNA vaccine followed by the inactivated vaccine at different intervals (e.g., 4 weeks, 8 weeks, 12 weeks, 16 weeks or 24 weeks later). * Participants will remain at the clinical center for at least 30 minutes after each vaccination. A few days after each injection, participants will contact staff by telephone or have a clinic visit. Participants will also be asked to complete a diary card at home for 5 days to keep track of temperature changes, injection site skin changes, and other effects. * Four weeks after the first injection, participants will return for a clinic visit and to provide blood samples for testing. * Two weeks after the second injection, participants will return for a clinic visit and provide blood samples (collected through apheresis) to provide information on immune response to the vaccine.
The purpose of this study is to compare the safety and immunogenicity over a 9-month period of five different dosages of Ad4-H5-Vtn in volunteers (Vaccinees) who receive three doses of the study vaccine or placebo. In addition, transmission of Ad4-H5-Vtn will be evaluated in all Household Contacts residing with the vaccinated volunteers. Vaccinees also may participate in a substudy in which they receive a booster vaccination with the licensed Influenza Virus Vaccine, H5N1 (Sanofi Pasteur).
Study Design: This is a Phase I, randomized, open-label study to evaluate the safety, tolerability, and immunogenicity of four vaccination regimens against the influenza virus hemagglutinin H5. One group will receive A/Indonesia/05/2005 (inactivated H5N1) vaccine as both prime and boost, two groups will receive the VRC-AVIDNA036-00-VP (DNA) vaccine as prime with inactivated H5N1 boost but with different boost intervals, and one group will receive the DNA vaccine twice as prime followed by H5N1 boost. The hypothesis is that these regimens will be safe for human administration and will elicit antibody and T cell responses against the H5 protein. The primary objectives are to evaluate the safety and tolerability of the investigational vaccine regimens, at a dose of 4 mg for the DNA vaccine and 90 microgram for the inactivated H5N1, in healthy adults. Secondary and exploratory objectives are related to the immunogenicity of the study vaccine regimens. Product Description: The inactivated H5N1 vaccine is monovalent subunit virion vaccine, A/Indonesia/05/2005 clade 2, manufactured by Sanofi Pasteur, Inc (Swiftwater, PA). Vaccine vials will be supplied at 90 microgram/0.5mL. The VRC-AVIDNA036-00-VP vaccine was developed and manufactured by VRC, NIAID and is composed of a single closed-circular DNA plasmid that encodes the H5 protein with a CMV/R promoter. Vaccine vials will be supplied at 4 mg/mL. Each vaccination will be administered intramuscularly (IM) in the deltoid muscle using needle and syringe for the H5N1 vaccine and the Biojector (Trademark) 2000 Needle-Free Injection Management System (Biojector) for the DNA vaccine. Subjects: A total of 60 healthy adults, ages 18-60 years will be enrolled. Study Plan: Subjects will be simultaneously randomized at a ratio of 1:1:1:1 into one of four groups. Subjects and clinicians will be blinded to group assignment until Day 0 following completion of the enrollment. At the point of enrollment the randomly assigned regimen will become known to subjects and clinicians. Subjects will receive either two or three injections on the schedule shown in the schema. The protocol requires five clinic visits and two telephone follow-up contacts for Groups 1, 2, and 3, and six clinic visits and three telephone follow-up contacts for Group 4.
This study will evaluate the safety and effectiveness of a vaccine to prevent avian influenza (bird flu). About 25 to 50 million cases of influenza occur a year in the U.S., leading to 150,000 hospitalizations and 30,000 to 40,000 deaths. Globally, a pandemic influenza may be 1 billion flu cases, with 3 to 5 million cases of severe illness and up to half a million deaths annually. There is potential threat of a pandemic from emerging virus strains for which the population has little or no preexisting immunity. Avian influenza A (H5N1) viruses causing serious disease have emerged recently, affecting domestic and wild bird populations. Patients ages 18 to 60 who are in good health and not pregnant or breast feeding may be eligible for this study. The study will be done at the NIH Clinical Center by staff of the Vaccine Research Center. It will last about 32 weeks for each person. A traditional needle or a needle-free device called Biojector 2000 will be used. Intramuscular (in the muscle) and subcutaneous (in fat below the skin) delivery of vaccine via Biojector is cleared for use by the Food and Drug Administration and is not considered investigational. Intradermal (in the skin) delivery of vaccine by Biojector in this study is deemed investigational but has been evaluated in humans before, and found safe and well tolerated in other trials. There will be about 10 clinic visits in this study, and it is important to stay on schedule. Visits are about 2 hours, though on injection days, visits are about 4 hours. Injections are given on day 0 and at weeks 4 and 8. The vaccine is given by injections in the skin on the upper arms. Clinic staff will observe patients for 30 minutes after each vaccination. One to 2 days after the first injection, there will be a clinic visit. One to 3 days after the second and third injections, patients need to telephone clinic staff to report on how they are doing. Patients will complete a diary card at home, recording temperature and symptoms, and looking at the injection site daily for 5 days. Patients should report any side effects to one of the study physicians or nurses as soon as possible. They will return to the clinic 2 weeks after each injection. A needle-free system uses the pressure of carbon dioxide, instead of a needle, to inject the vaccine into the skin. Discomfort can result from either the needle-free device or the needle. There may be stinging, pain, soreness, swelling, bruising, or a small cut in the skin.
Over the past decade, avian influenza (AI) has become a major health concern. The development of a safe and effective vaccine against H5N1 infection is important. The purpose of this study is to determine the safety of a new AI vaccine in healthy adults.
This study will determine if an experimental avian flu (bird flu) vaccine is safe, whether it has side effects and if it can stimulate an immune response in people. The vaccine being tested in this study is made from DNA (genetic material) that codes for an influenza protein called hemagglutinin 5 (H5), which is based on the protein from the bird flu virus. The study will determine if the body creates resistance or immunity to the H5 protein. The hope is that an immune response to this protein may protect against bird flu virus infection. Healthy people between 18 and 60 years old who have been vaccinated with the current season's influenza vaccine may be eligible for this study. Participants are randomly assigned to receive injections of one of the following: 1) study vaccine at 1 mg dose, 2) study vaccine at 4 mg dose, or 3) placebo (salt-water solution). They receive three injections about 4 weeks apart in the upper arm muscle. Participants record their temperature and symptoms at home for 5 days after each injection, either on a diary card or electronically using the Internet, and report any side effects to a study physician or nurse as soon as possible. They return to NIH for clinic visits every 2 weeks for the first 12 weeks, then at week 26 and at week 42 to check for health changes or problems. Blood is drawn at all visits and urine samples are collected through week 10. If a participant develops serious side effects, the study physician may decide that he or she should not receive any further injections. However, all participants are asked to continue the follow-up visits even if they do not get the full set of three injections. ...
Avian influenza (AI), also known as bird flu, has become a major public health concern in many regions of the world. The purpose of this study is to evaluate the safety of and immune response to an AI vaccine in healthy adults.
Avian influenza (AI), or bird flu, has recently become a major health concern in Asia and other parts of the world. The need for a vaccine to prevent the spread of AI among livestock and to humans is sorely needed. The purpose of this study is to test the safety of and immune response to a new AI vaccine in healthy adults.
Avian influenza (AI), or bird flu, has recently become a major health concern in Asia and other parts of the world. The purpose of this study is to test the safety of and immune response to a new AI vaccine in healthy adults. Study hypothesis: Influenza A viruses are widely distributed in nature and infect a wide variety of birds and mammals. The direct transmission of avian influenza viruses from birds to humans has recently become a major health concern in Asia and other parts of the world, raising concern of a possible influenza pandemic in humans. This vaccine will evaluate the safety, infectivity and immunogenicity of Live Influenza A vaccine H9N2 (6-2) AA ca reassortant (A/chicken/Hong Kong/G9/97 x A/Ann Arbor/6/60 ca), a cold-adapted, live attenuated virus vaccine administered intranasally for the protection of humans against pandemic influenza viruses of the H9N2 subtype.