94 Clinical Trials for Various Conditions
This trial in healthy adults will determine the effects of beta-glucan, a dietary fiber supplement isolated from baker's yeast, on immune response to the influenza vaccine.
In this study the investigators are trying to understand how immune function declines in the elderly using annual influenza vaccinations as a model system. The longitudinal study began in 2007 and continued through early 2017.
This study will evaluate how HIV infection, including CD4 cell count and viral load, affects the patient's ability to produce antibodies in response to vaccination with the influenza (flu) vaccine. Earlier studies have shown that people with HIV infection do not respond as well as healthy subjects to flu vaccine; that is, they don't make as many antibodies in response to the vaccine. Before the use of current anti-HIV medications, antibodies made to flu vaccination in HIV-positive individuals was related to their CD4 cell count. This trial will examine how CD4 counts and the amount of virus in the blood affect how much and what kind of antibodies the body makes to the flu vaccine. HIV-infected patients and healthy normal volunteers between 18 and 60 years of age may be eligible for this study. Healthy subjects will serve as controls to make sure the flu vaccine works (i.e., stimulates production of enough antibody to protect against the flu), and to compare the amount of antibodies made by HIV-positive and HIV-negative people. Candidates will be screened with a medical history and blood tests (see below). Women who are able to have children will have a pregnancy test. Pregnant women are excluded from the study. Participants will undergo the following procedures: 1. Blood drawing for the following tests: * Routine tests (complete blood count, kidney and liver functions, electrolyte levels). * CD4 cell count. * HLA typing (a genetic marker of the immune system) if it has not already been done at the NIH. This test may be used to try to identify factors associated with the rate of progression of HIV disease or related conditions. Determining HLA type is necessary to be able to perform certain research studies. Some HLA types have been associated with an increased risk of certain diseases like arthritis and other rheumatologic problems. * Viral load (HIV-infected patients only). * Influenza antibody levels. * B cell levels. 2. Flu vaccination 3. Follow-up visits on days, 7, 28, and 54 after vaccination for the following: * Review of any illnesses or fever. * Review of medications, if any changes were made. * Repeat blood tests.
The purpose of this study is to determine what the immune response is of ovarian cancer patients in remission, when they are given the flu vaccine. After receiving the flu vaccine, patients will have blood drawn 5 times in 12 months to study antibody response to the flu vaccine.
The purpose of this study is to assess the serologic and cell-mediated immune response to licensed live attenuated influenza vaccine (LAIV) and inactivated influenza vaccine (IIV) in children 5-17 years old. The effects of prior infection and or prior season vaccination will be examined. Children will be followed during the influenza season to identify laboratory-confirmed influenza (i.e. vaccine failure).
The purpose of this study is to evaluate the body's immune response at different time points to an FDA-approved seasonal influenza vaccine. By better understanding the way the immune system responds to the influenza vaccine, the investigators can design more effective vaccines against influenza.
This is a prospective pilot study designed to suggest differences in the immunologic response to the seasonal influenza vaccine in people with regular vaccination history compared to those vaccinated less regularly. Participants will receive one dose of the Food and Drug Administration (FDA) approved 2016-2017 seasonal influenza vaccine. Immune system data will be collected at standard time points. The duration of the study for each participant will be approximately 1 month.
This study will compare influenza vaccine responses in monozygotic and dizygotic twins.
Some people experience symptoms just after receiving the seasonal inactivated influenza vaccine. The cause of some of these symptoms is likely to be an immune response to the vaccine. The investigators would like to look at the earliest immune responses to the inactivated influenza vaccine. This pilot study will help us to determine at what time points we should look.
Investigators in the Division of Infectious Diseases are carrying out a study to determine if human immunodeficiency virus (HIV)-seropositive patients receiving the Seasonal Influenza vaccination develop an adequate antibody response. The study group will consist of individuals seen in the Infectious Diseases Clinic who are HIV-seropositive and receive the Seasonal Influenza vaccine.
The study is designed to demonstrate a meaningful difference in immunogenicity between the candidate adjuvanted vaccine compared to the licensed Fluarix vaccine in subjects aged 50 years and above. A control group in younger adults aged 18 to 40 years was included.
The purpose of this study is to compare two flu vaccines to determine their safety and ability to stimulate an immune response in HIV infected children and adolescents. This study will also determine how often and how long people who receive a vaccine are able to spread flu vaccine virus to other people.
This study may determine whether laboratory studies of people's blood cells, who have received vaccines against H5 influenza, or "bird flu," will help to decide if the vaccines are going to be prevent disease effectively. About 232 people, 18 years and older, enrolled in the studies "A Randomized, Double-Blinded, Placebo-Controlled, Phase I/II, Dose-Ranging Study of the Safety, Reactogenicity, and Immunogenicity of Intramuscular Inactivated Influenza A/H5N1 Vaccine in Healthy Adults" and "in Healthy Elderly Adults" will participate. Participants may be involved in this study for about 14 months. Procedures may include blood draws, physical exams, and medical history reviews.
Background: Vaccines help prevent disease by causing the body to have an immune response. Many parts of this response happen in the blood. This response happens over days and weeks after getting the vaccine. Researchers want to how the blood changes over time in response to vaccines. They want to find out why vaccines work better for some people than for others. This could help make more effective vaccines. Objective: To learn about how the body responds to vaccines. Eligibility: Healthy people ages 18 and older Design: Participants will be screened with a medical history, physical exam, and blood and urine tests. Participants will have 9 visits over 6 months. All visits will include blood tests and a physical exam. Participants will have the first visit 1 week before they get the vaccine. Participants will get the flu vaccine at the second visit. The vaccine will be injected into the muscle of the upper arm with a needle. They will be watched for side effects for 15 minutes. Participants will have the next 2 visits exactly 1 day and 1 week after they get the vaccine. They will have the other 5 visits about 14, 28, 70, and 100 days after they get the vaccine. Participants will take email questionnaires about whether they had any side effects. Participants may have optional extra study visits. These will be no more than once a month for up to 1 year after they get the vaccine. Optionally, they can also repeat the study each year through the 2023 - 2024 flu season
The purpose of this pilot research project is to look at the effect of the inactivated influenza vaccine (seasonal flu shot) on early signs of immune or germ-fighting response known as cytokines or signal molecules. The investigators also want to see if the timing of vaccine administration has any effect on women's reproductive hormones. The investigators hypothesis is that influenza vaccine given right before ovulation may change the hormone levels usually seen after ovulation. Thi
H5N1 is an influenza virus that has the potential to cause an influenza pandemic. This study will evaluate the safety and immune response to an H5N1 influenza vaccine in people who have previously received one of two versions of an H5N1 vaccine or have previously received an H7N3 vaccine and in people who have not previously received any live attenuated influenza vaccine (LAIV).
This study is designed to characterize the safety and immunogenicity of a' pandemic influenza (H1N1) candidate vaccine GSK2340274A in adults 19 to 40 years who have never received influenza vaccination.
Both pregnant women and people infected with HIV are at increased risk of viral infection, including influenza infection. Pregnant women infected with HIV may be at particular risk of infection from the new H1N1 influenza virus. This study tested the safety and immunogenicity of an H1N1 influenza vaccine in pregnant women infected with HIV.
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.
The primary objective of this study was to perform a variety of assays on blood, serum, nasal wash and cell samples obtained from healthy adult subjects for the purposes of developing assays for application in the further investigation of immune responses generated by influenza virus vaccine, trivalent, types A \& B, live, cold-adapted (liquid formulation CAIV-T; Wyeth, Marietta, PA).
Background: - One form of the influenza vaccine is a nasal spray. It uses a live but weakened flu virus. Researchers want to better under how the live vaccine interacts with the body s immune system. They will test the nasal spray flu vaccine (called FluMist) against a saline (salt water) nasal spray. They will then look at blood and nasal cell samples to see how the vaccine affects these cells immune response. Objectives: - To look at immune changes in nasal and blood cells in people who receive live flu vaccine. Eligibility: - Healthy volunteers between 18 and 49 years of age. Design: * Participants will have five outpatient visits for this study. Each visit will last up to 2 hours. * At the first visit, participants will have a physical exam and medical history. They will give blood and urine samples. Nasal cell samples will also be collected. * A week later, participants will have either the nasal spray flu vaccine or a saline spray. They will know which spray they will receive. Blood samples will be collected. * Two days after the vaccination, they will have another physical exam. Blood and nasal cell samples will be collected. * At the final two visits (1 week and 1 month after the vaccination), more blood samples will be collected. * Those who had the saline spray will be able to have the actual vaccine spray at the last study visit. * The ratio of participants who receive vaccine to those who receive saline will be 4:1.
This study will evaluate the effect of the microorganisms in the gut on how well the flu or COVID-19 vaccine works in people who have a weakened immune system due to inflammatory bowel disease. Participants can expect to be in the study for up to 65 days.
Children and people infected with HIV are particularly susceptible to influenza infections. This study testED the safety and effectiveness of a vaccine for the new H1N1 influenza virus in children and youth infected with HIV.
The goal of this research is to find out how the body's immune system responds to different manufacturer's "flu" vaccines.
The purpose of this study is to compare two licensed influenza vaccines (Fluzone and Fluarix) in terms of the immune response elicited and the safety/ any symptoms that may occur for up to six months after vaccination.
The purpose of this study is to describe the level of serum antibody conferred by CAIV-T and TIV against homotypic and heterotypic influenza virus strains.
Licensed influenza vaccines are manufactured with a variety of technologies. The majority are split, inactivated vaccines derived from egg-adapted, high growth reassortant viruses. Two US licensed products do not use egg-adapted viruses: Flucelvax (mammalian cell culture) and FluBlok (recombinant). There is increasing evidence that egg propagation induces virus mutations that impair the immune responses to circulating viruses. However, the impact of egg-propagation on clinical vaccine effectiveness is uncertain, and there is no preferential recommendation for any specific influenza vaccine product or technology. A direct comparison of serologic response to egg based and non-egg based vaccines in adults has not been performed. This randomized trial will compare serologic responses to the egg- and non-egg A(H3N2) vaccine component. The study cohort will be followed for two influenza seasons to evaluate sequential vaccination effects on immune response.
H7N9 viruses have caused a recent outbreak of severe illness in humans in China. The purpose of this study is to evaluate the safety and immune response of an H7N9 A/Anhui/13 ca influenza virus vaccine followed by an inactivated subvirion H7N9 vaccine at varying intervals.
This pilot clinical trial studies high-dose trivalent influenza vaccine in inducing immune response patients with central nervous system tumors. Studying samples of blood in the laboratory from patients receiving trivalent influenza vaccine may help doctors learn more about the effects of trivalent influenza vaccine on cells. It may also help doctors understand how well patients respond to treatment.
A Randomized, Double Blind, Placebo Controlled Phase 2 Study To assess the Immune Response Following Administration of Influenza and Pneumococcal Vaccines to Subjects with Rheumatoid Arthritis receiving CP-690,550 with and Without background Methotrexate