Active clinical trials for "Influenza, Human"

The spread of Influenza H1N1 has prompted the development of vaccines against this virus. Immunocompromised patients are at increased risk of developing complications of Influenza H1N1. The efficacy and safety of H1N1 vaccination have not been evaluated in this population of patients.

A randomised controlled trial to determine the efficacy of chloroquine for the prevention of influenza

Following the sudden and unexpected emergence of influenza A(H1N1)pdm09 (2009 H1N1) virus, this observational study was initiated to describe participants seeking medical care in geographically diverse locations with 2009 H1N1 infection and their clinical course over a 14-day period following enrollment. In 2011, as surveillance indicated that 2009 H1N1 virus was co-circulating with other seasonal influenza A and B viruses worldwide, the protocol was expanded to include other influenza A subtypes and influenza B viruses. This version of the protocol further broadens the scope of this observational study. With the recognition that novel respiratory viruses other than novel influenza A viruses, e.g., Middle East Respiratory Syndrome Coronavirus (MERS-CoV), could become prevalent and of major public health importance, the objectives of this protocol have been expanded

This is to evaluate safety of cell-derived A/H1N1 influenza HA vaccine in healthy Japanese subjects.

Experimental and clinical studies in adults have reported that green tea catechins prevent influenza infection. In this clinical randomized study, the investigators aimed to determine the effects of gargling with green tea on the prophylaxis of influenza infection among high school teenagers.

To collect background information of patients receiving a prescription for Relenza® and study risk factors etc. for adverse drug reactions collected through spontaneous reporting. In particular, to characterize the types and incidences of adverse events, serious adverse events, and adverse drug reactions and to investigate risk factors for them in patient populations that are regarded to be at high risk for novel influenza A (H1N1)and in which the use experience of Relenza® has not been enough (such as pregnant women, infants, elderly persons, and those with decreased physical function) in accordance with the PFSB/SD Notification 0904, No.2 of the Safety Division, Pharmaceutical and Food Safety Bureau, MHLW, dated 4th September 2009. To compare the data with the safety data collected in overseas sentinel site monitoring programs.

The main focus of the study is: To estimate seroprevalence of AI in poultry-exposed and non-exposed human populations. To estimate the incidence of AI in poultry-exposed and non-exposed human populations. To investigate risk factors associated with AI infections in occupationally-exposed poultry workers. The secondary objectives of the study: To investigate patterns in transmission of AI to household contacts of AI clinical cases To isolate AI viruses from acute cases To monitor the pathogenicity and disease severity of AI viruses causing human infections

This study will evaluate how the immune system responds to influenza infection and compare how the infection differs in patients with a weakened immune system versus those with a healthy immune system. Patients at the NIH Clinical Center who are older than 2 years of age and who are diagnosed with influenza A or B may be eligible for this study. Patients with healthy immune systems and weakened immune systems are included. Participants answer questions about how they are feeling and have a physical examination to evaluate their symptoms. Blood and nasal fluid are collected on the first day and then every other day for a total of 8 days. Nasal fluid is collected by either inserting a small tube in the nose and washing the nose with salt water and collecting the fluid obtained, or by rubbing the inside of the nose with a swab. Physical examinations are repeated on the days that blood and nasal fluid are collected.

The investigators purpose is to prospectively characterize influenza infections over a 3 year period in transplant patients using a registry system. The investigators plan to generate robust data on clinical features of upper and lower respiratory disease, antiviral therapy and its effects on disease outcome, as well as quantitative virologic data on shedding and antiviral resistance. The investigators also will study the long term sequelae of influenza infections and look at development of rejection.

The overall objective of this study is to provide ongoing assessment of the safety and effectiveness of seasonal and pandemic H1N1 vaccines in the prevention of ILI (influenza like illness), ILI-associated work absenteeism, and laboratory-confirmed influenza in a cohort of Canadian HCP (Health care providers). Given the uncertainties around the timing of the provision of seasonal influenza immunization to HCP for the 2009/10 influenza season, this study will focus on evaluation of safety and effectiveness of pandemic influenza immunization in Year 1 and evaluation of all recommended influenza vaccines in Years 2 and 3.