Active clinical trials for "Influenza, Human"

The purpose of this research study is to collect information on problems that patients with the novel H1N1 influenza and/or the seasonal influenza experience. Novel H1N1 flu is also called the swine flu. Seasonal influenza is also called the regular flu. The purpose of this study is to collect information from patients who are infected with either the novel H1N1 or the seasonal flu and to determine what makes patients critically ill with these infections. The goal is to develop a registry that will aid investigators in determining specific markers that lead to development of severe illness in these infections.

This is a specimen collection protocol designed with the purpose of understanding the immune responses to influenza in children and adult subjects through collection of blood specimens and influenza medical history data. This protocol will allow the investigators to evaluate influenza-specific immune responses to a variety of influenza strains in a broad age range of the U.S. population early and late in the 2010-2011 influenza season. Immune responses will be evaluated using blood samples. The underlying hypothesis for this protocol is that the detailed characterization of immune responses to influenza in subjects from different age groups will further the understanding of immune responses cross-reactivity and advance development of influenza vaccines that are cross-reactive against old, new and re-emerging influenza strains.

The objective of this study is to demonstrate the clinical performance of the Quidel Reader Influenza A+B test and Quidel Reader with the following sample types: nasal swab, nasopharyngeal swab, and nasopharyngeal aspirate/wash. Clinical performance will be based on comparison of Quidel Reader Influenza A+B results to cell culture at a Central Reference or Alternative Laboratory.

The purpose of this study is to develop a real-time diagnostic technique with e- Ab sensor for influenza virus detection, the investigators conduct a prospective clinical study. In comparison with results from direct sequencing of influenza virus, the investigators evaluate the performance of e- Ab sensor, including reproducibility, sensitivity, specificity, and cross-reaction. The potential factors which may interfere with the results would be investigated. With such technique, the investigators hope to make early diagnosis and give influenza virus patients early treatment to reduce the complications and case-fatality rate.

The surveillance of influenza virus among children with febrile reparatory complaints attending the pediatric clinic in Shantou is an epidemiologic study to identify the type (influenza A or B) and the subtype of Influenza A of the isolates from children with febrile respiratory complaints who attend the pediatric clinic of the first Affiliated Hospital, Shantou University Medical College, Shantou Guangdong, China. Also this study investigates the genetic composition of all segments of isolated strains using standard molecular techniques and to make available the new strains of influenza viruses isolated from such children for the formulation of influenza vaccines. Clinical manifestation of the respiratory illness is recorded and single nasopharyngeal swab is obtained from eligible children. Viral culture is performed on the nasopharyngeal secretions. If influenza is isolated, this is characterized if it belongs to influenza A or B. If the virus is characterized as influenza A, further antigenic studies is done to determine subtype of influenza. Viral isolates is further studied to determine the genetic composition of the virus. Information obtained from the viral isolates is shared with the WHO and the CDC.

The purpose of this study is to evaluate the immune response to a routine influenza vaccination. Influenza vaccination is given as part of routine standard of care in these individuals and is not part of the study protocol. The study will evaluate for a change in response to common antigens over time after influenza vaccination to determine if changes are related to the development of chronic rejection after solid-organ transplantation. We hypothesize that the influenza vaccine contributes to the alloreactivity of T cells verses common HLA types in the donor pool.

Influenza (the flu) is a leading cause of respiratory (breathing) illness that leads to sickness and death during the winter months. A better understanding of why certain people get the flu or get sicker with the flu than other people is important for developing improved vaccines and treatments. This study will look at the genetic makeup (determines each person's specific characteristics and traits) of 50 patients, older than 50, who were hospitalized with flu at Vanderbilt University during the 2006-2007 flu season. Their genetic makeup will be compared with the genetic makeup of 50 people who are not related but were in close daily contact with the flu patient and were not infected with flu virus. The study staff will collect a blood sample (contains genetic material) from each participant (flu patients and their contacts) for comparison. Flu patients will have completed a health survey as part of the previous study, and their contacts will complete a shorter version of this survey.

The primary objective of this study is to evaluate how implementing an innovative care model that provides the pharmacist access to a patient's vaccine history at the point-of-care impacts the pharmacist's ability to identify unmet vaccination needs and increase vaccination rates for routinely recommended adult vaccinations.

The aims of this study are: to investigate if HIV infection alters the antibody responses to influenza and to assess the ability of licensed influenza vaccine to induce functional non-neutralising antibodies in HIV-infected and HIV-uninfected subjects.

This is a global, multi-center, observational registry of participants with suspected or confirmed infection with avian influenza A H5N1. Data are collected through retrospective abstraction, from detailed case reports that may be published and available in the public domain, or as incident cases received directly from the treating physician or other medical personnel.