Active clinical trials for "Virus Diseases"

Since its first outbreak occurred in 1976, Zaire Ebola virus have been associated with 14 outbreaks reported up to 2014. The Zaire Ebola virus in 2014 causing the most serious outbreak was considered to be a new epidemic strain, with GP homology of the gene was only 97.6%, compared to the GP gene of the strain in 1976. This investigational Ad5-EBOV vaccine was developed according to the 2014 epidemic Zaire strain and formulated as freeze-dry products which could be stored at 4℃. This is a single center, double-blind, placebo control, dose-escalation phase 1 clinical trial. This study will determine the safety and side-effect profile, and immunogenicity of an investigational Ad5-EBOV vaccine.

Ebola virus causes an infection known as Ebola virus disease (EVD). This it is generally a severe disease which can also lead to death. The 2014 outbreak of EVD in West Africa is the largest ever. Researchers want to develop a vaccine to prevent Ebola infection. This study will assess the safety of a single dose of the bivalent Ebola Zaire candidate vaccine VRC-EBOADC069-00-VP (cAD3-EBO) when administered to healthy Malian adult volunteers, age 18-65 years (mostly health care workers and other front line workers [e.g., individuals who incinerate contaminated materials]), at one of 2 dosage levels, 2.0 x 10(10) vp or 2 x 10(11) vp. It is impossible for someone to get an Ebola infection from this vaccine. Heterologous booster dose allocation - Each participant will be offered the opportunity to be included in the booster step of this study. After obtaining consent and the additional review of pertinent medical history, participants in each group will be randomized to receive the candidate booster vaccine, MVA-EbolaZ or placebo. This will be the first clinical trial in Mali with bivalent cAd3-based Ebola vaccine and the first where the dosage level contains > 10(11) vp. It follows completion of a Phase Ib trial in Malian health care workers that tested three dosage levels of monovalent cAd3-EBO Z vaccine. The data generated in West Africans (Mali) on the tolerability and immunogenicity of the bivalent vaccine will be compared to clinical and immunologic responses documented in in parallel studies in East African subjects (Uganda) and North American subjects (NIH, Bethesda, MD, USA). Objectives: To see if an Ebola vaccine is safe and to study immune responses to it. To study the effect of the MVA-EbolaZ booster on the immune response Eligibility: - Healthy adults ages 18-65.

Influenza poses a heavy burden to our health service. The WHO estimates that seasonal influenza causes 250,000-500,000 deaths worldwide each year. Various strategies including intradermal vaccination and new vaccine adjuvants have been shown to improve immunogenicity. Recently, imiquimod, a synthetic Toll-like receptor 7 (TLR7) agonist useful for the treatment of DNA virus infection, have been shown to improve vaccine immunogenicity against influenza virus in mouse model. The objective of this prospective double-blind randomized controlled trial is to evaluate the effect and safety of topical treatment with imiquimod immediately before intradermal influenza vaccination in healthy young adults.

The purpose of this study is to determine whether FVH1, a DNA-based influenza vaccine, will be safe and generally well tolerated in healthy elderly adult volunteers and will result in greater immunogenicity when used to prime the immune response to a dose of a trivalent inactivated seasonal vaccine.

The purpose of this research study is to learn more about the use of viral specific T-lymphocytes (VSTs) when given in the presence of COVID-19 signs and symptoms, caused by the virus SARS-CoV-2. VSTs are cells specially designed to fight viral infections. These cells are created from a blood sample collected from a donor who has recovered from COVID-19 infection. VSTs are investigational meaning that they are not approved by the Food and Drug Administration (FDA). COVID-19 is a new virus and treatment options are evolving rapidly. VSTs have been successfully used to treat many different viral infections and may be beneficial in treating COVID-19 in the absence of other treatments.

The study is a multi-center, multi-national, prospective surveillance study in which the study participants will not receive a study vaccine but will provide a baseline blood sample and be followed for acute respiratory disease during 6 months. The 6-month follow-up will occur for the most part during the Respiratory Syncytial Virus(RSV) season (based on enrollment timing and as per feasibility). A maximum of 1000 children from 6 to < 22 months of age are planned to be enrolled in 5 to 10 countries, 1 to 2 sites per country, targeting approximately 100 participants per country. The purpose of the study is to assess the seroprevalence and incidence of RSV disease during the study period in the targeted countries and sites for a Phase III vaccine study.

BK virus (BKV) infection has a major negative impact on transplant recipients. No BKV-specific antiviral therapy is available, so there is an urgent need to develop new anti-BKV preventive and therapeutic strategies.

The goal of this observational study is to learn about infectious complications in patients affected by B-cell acute lymphoblastic leukemia treated with inotuzumab-ozogamicin (INO). The main question it aims to answer is: • incidence of infectious complications (bacterial, fungal, viral) in patients receiving inotuzumab ozogamicin up to 60 days after the end of treatment

Background: Respiratory viruses circulate throughout the year and around the globe. Wearable and sensor devices, like smartwatches, may be able to help monitor infectious diseases. Researchers want to use them to learn how respiratory viruses affect people in different ways. Objective: To use digital devices to collect data from participants in challenge studies that could indicate subtle changes in health during an infection that might otherwise go unnoticed. Eligibility: Healthy adults who have enrolled in a challenge study. Design: Participants will stay at NIH for at least 9 days and then they will have outpatient visits. While at NIH, participants will wear a smartwatch at all times. It will record data like temperature, heart rate, breathing rate, and movements. Participants will have 2 smartphones. One will be recording at all times to listen for coughing. Participants will use the other smartphone to check their vital signs. They will collect data like heart rate, temperature, and the level of oxygen in the blood every 4 hours during the daytime. Participants will perform tasks every 4 hours during the daytime. They will record themselves coughing, breathing in deeply, and reading aloud. They will take pictures and videos of their face. A bedside sensor will record participants while they sleep. It will record heart rate and breathing rate. It will also look at sleep activity, such as movements participants make during sleep and how deeply they sleep. Participants sharing the same room will be exposed to the same challenge virus. For outpatient visits, participants will use one smartphone and the smartwatch to complete the above tasks. Participation will last from 10 weeks to 1 year.

The goal of this monocentric prospective observational study is to evaluate the prevalence of unknown hepatitis C virus chronic infection in general population born before january 1st 1968 in Italy. The main questions it aims to answer are: what is the prevalence of hepatits C virus infection in general population born before January 1st, 1968? What rare the characteristics of these patients compared to the general population? What is the prevalence of patients tested HCV positive who are referred to the Hepatology Outpatient Clinic for further evaluation? What is the prevalence of patients with HCV infection detected during the study and treated with direct antiviral agents during follow up? Participants will be tested with a point of care screening test (Meridian, Bioscience) able to detect anti-HCV antibodies to detect the presence of antibodies against HCV.