Active clinical trials for "Virus Diseases"

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.

The purpose of this study was to evaluate the efficacy of the Norwalk virus-like particle (VLP) vaccine as determined by the illness rate of viral acute gastroenteritis (AGE) during the inpatient stay.

The primary safety objective of this study is to assess the safety of 10 mcg recombinant hepatitis B vaccine in the Chinese health neonates. The primary immunogenicity objective is to assess the antibody response following 3 doses immunization of the 10 mcg experimental dose and 10 or 5 mcg control dose, Participants will include up to 1740 healthy neonates. This is a randomized, double-blinded, Phase III study. This study is designed to investigate the safety, reactogenicity, and immunogenicity of 10ug recombinant hepatitis B vaccine (yeast). Subjects will be stratified by the mother with positive for both HBsAg and HBeAg, positive for the surface antigen but negative for HBeAg, negative for the HBsAg and HBeAg and HBeAb and HBcAb. Stratified 1: There are 180 neonates born to the mother with positive for both HBsAg and HBeAg will be randomized into two groups according to the ratio of 2:1. 120 subjects will receive the 10 mcg experimental vaccine and 60 subjects will receive 10 mcg control vaccine respectively. Stratified 2: There are 360 neonates born to the mother with positive for HBsAg but negative for HBeAg will be randomized into two groups according to the ratio of 2:1. 240 subjects will receive the 10 mcg experimental vaccine and 120 subjects will receive 10 mcg control vaccine respectively. Stratified 3: There are 1200 neonates born to the mother with negative for the HBsAg and HBeAg and HBeAb and HBcAb will be randomized into 3 groups. 600 of them will receive the 10mcg experimental vaccine. 300 subjects will receive 10mcg control vaccine. And the other 300 subjects will receive 5mcg control vaccine. The recombinant hepatitis B vaccine will be administered at m0, 1 and 6. Following each immunization, safety will be measured by assessment of adverse events through 30 days following each vaccination, serious adverse events and new-onset chronic medical conditions through 6 months post the final vaccination (Day 180 after last vaccination). For the immunogenicity testing will apply the chemiluminescence immunoassay on serum obtained on the day 0, 210 and 360 after born.

This is an exploratory trial of Bovine Colostrum powder to decrease translocation of gut-derived microbial products and immune activation in HCV infection. The study is designed as a single-arm, open-label, before-and after exploratory trial of 10 weeks of Bovine Colostrum Powder (BCP) to reduce translocation of intestinal microbial products and immune activation in patients suffering from chronic hepatitis C virus (HCV) infection. The study population will include HCV-infected (genotype 1) men and women, ≥ 18 years of age, not receiving anti-viral therapy at the time of enrollment and for at least the previous 3 months. Having failed previous anti-viral therapy (non responders), HCV recurrence after 72 weeks of therapy, developed side effects which mandated stopping anti viral therapy, or not considered eligible for initiation of such treatment, with a plasma HCV RNA level ≥ 1000 I.U.

This study will determine whether participants who receive the vaccine V419 at 2, 3, 4, and 12 months of age have an acceptable immune response to the vaccine. The study will also determine whether the immune response to V419 is similar to that of participants who receive a licensed vaccine control.

This study will determine if an experimental vaccine to prevent Ebola virus infection is safe and what side effects, if any, it causes. Ebola virus infection may range from mild to severe, and may cause breathing problems, severe bleeding, kidney problems and shock that can lead to death. The vaccine used in this study contains man-made genetic material similar to one part of the Ebola virus, which is designed to stimulate an immune response to the virus. The vaccine itself cannot cause Ebola virus infection because it does not contain any Ebola virus. Participants are assigned to one of three groups as they enter into the study. Of the first 16 people in the study, 12 receive the lowest study dose of vaccine and 4 receive placebo (an inactive substance). If this dose is safe, then of the next 16 people who enter the study, 12 receive a higher dose of the vaccine, and the remaining 4 receive placebo. If this dose is safe, the final 12 people in the last group of 16 receive the highest study dose, and 4 receive placebo. The vaccine is given as a single injection in the arm on the day of enrollment. Participants keep a diary for 5 days, recording their temperature, symptoms and any reaction at the injection site. They call a study nurse the day after vaccination to report how they feel, and they return to the clinic approximately six times for follow-up evaluations. These visits may include a check of vital signs, physical examination, blood and urine tests, or other medical tests if needed. ...

This phase 3 clinical study is a randomized, observer-blind, comparator-controlled, multicenter study of QIVc versus a US-licensed comparator QIV in children 6 months through 47 months of age. The purpose of this study is to demonstrate that vaccination with QIVc elicits an immune response that is noninferior to that of a US-licensed comparator QIV containing the same virus strains, in children 6 months through 47 months of age.

This protocol tests the safety and efficacy of a novel universal vaccine concept called "allo-priming" which is designed to protect elderly adults from progression of any type of viral infection, including possible protection against progression of the current outbreak of COVID-19 infection, and any future variants, strains, mutations of the causative SARS-CoV-2 virus as well as protection from any future currently unknown newly emergent novel viruses.

Ebola virus disease (EVD) is a serious illness with a high fatality rate. Currently only one vaccine is available, VSV-ZEBOV/Ervebo; this vaccine is clinically effective and has been deployed as a preventive measure during recent Ebola outbreaks. The durability of protection afforded by this vaccine is unknown, however, and it is thought that a booster vaccination may be required to maintain immune responses. Recently, a synthetic DNA vaccine, INO-4201, was tested in humans and showed good immunogenicity and an enhanced safety profile. This study aims to test whether the DNA-based candidate INO-4201 can be used as a booster in healthy volunteers previously vaccinated with VSV-ZEBOV.