Active clinical trials for "Influenza, Human"

The purpose of this study is to determine the safety and effectivess of a single intramuscular injection of peramivir for the treatment of subjects with acute, uncomplicated influenza.

This is a randomized clinical trial designed to evaluate oral nitazoxanide compared to a placebo in the treatment of acute uncomplicated influenza in adults. We hypothesize that treatment with nitazoxanide will reduce the duration of symptoms in patients with confirmed influenza infection. Secondarily, we hypothesize that treatment with nitazoxanide will reduce the complications of influenza, severity of symptoms, time lost from work, time to return to normal daily activities, and viral shedding.

To assess the efficacy and safety of oral rosuvastatin in patients with suspected or confirmed influenza who require intensive care unit (ICU) admission due to respiratory distress.

The primary objective of the study is to compare the clinical efficacy of high-dose quadrivalent influenza vaccine (QIV-HD) to standard-dose quadrivalent influenza vaccine (QIV-SD) in participants 6 months through 35 months of age for the prevention of laboratory-confirmed influenza illness caused by any influenza A or B type. The secondary objectives of the study are: To compare QIV-HD to QIV-SD: in participants 6 months through 35 months of age for the prevention of laboratory-confirmed influenza illness caused by any influenza A or B type using a more stringent threshold in participants 6 months through 35 months of age for the prevention of laboratory-confirmed protocol-defined influenza-like illness caused by viral strains similar to those contained in the vaccine. in participants 6 months through 23 months of age for the prevention of laboratory-confirmed influenza illness caused by any influenza A or B types. To compare hemagglutination inhibition (HAI) immune response of QIV-HD to QIV-SD in participants 6 months through 35 months of age To describe the HAI, seroneutralization (SN), and anti-neuraminidase (NA) immune response To describe the immune response to revaccination in Season 3 (Northern Hemisphere) To describe the safety profile of each vaccine

The study aims to characterize the community burden (including the clinical features) and transmissibility of SARS-CoV-2 within the context of a functional antibody response. In addition,the study will assess the effect of the interaction of SARS-CoV-2 with influenza virus and RSV on disease severity and transmission dynamics. A household-level prospective cohort study will be conducted in one rural and one urban community located in Mpumalanga Province and North West Province, respectively. The study will be conducted for 12 months of intensive follow up (July 2020 to August 2021) with a post-intensive follow-up continuing for a further 16 months (until December 2022). Two hundred households; 1,000 study participants of all ages; will be randomly selected from a list of 327 hoseholds that participated and successfully completed a 10-months follow-up period in a study similar to that currently proposed, but directed at community burden and transmission dynamics of influenza, respiratory syncytial virus and other respiratory pathogens. Each household and household member will be enumerated and the HIV infection status and the level of immunosuppression of HIV-infected individuals will be assessed. Each household member will be followed twice per week during the intense follow-up period (12 months) of the study. During this period upper respiratory tract samples will be collected irrespective of presence of symptoms and data on key symptoms, healthcare seeking, hospitalization and death will be captured at each follow up visit. Respiratory samples will be tested by reverse transcriptase real-time polymerase chain reaction (rRT-PCR) for SARS-CoV-2, influenza and RSV, and selected samples will be cultured and sequenced. An infection risk questionnaire will be administered to all study participants at enrollment and every month thereafter. Sera will be collected at enrollment and every 2 months during the 12-month intense follow-up period from all participants. In addition, sera will be collected every 2 months for a further 6 months following the 12-month intense follow-up period from study participants that tested positive for SARS-CoV-2 by rRT-PCR on respiratory specimens at 14, 16 and 18 months and from all study participants at 18 months. Sera will be tested for the presence of SARS-CoV-2, influenza and RSV antibodies. Wearable proximity sensors will be deployed for 8-12 days in each household over the 6-month intense follow-up period.

This is a study to evaluate the efficacy and safety of a single dose of intravenous peramivir versus placebo in adolescents and adults with acute uncomplicated influenza.

AIGI (Adaptive Immune Response to Seasonal Influenza Vaccination) is a prospective clinical study aiming at studying the kinetics of vaccine-specific antibody production after seasonal influenza vaccination in health care workers.

This Phase 1/2 protocol is designed to collect safety, tolerability and pharmacokinetic data of two doses of Laninamivir Octanoate in children and adolescents. The protocol will also explore virology and efficacy endpoints.

Each winter, viruses belonging to two kinds of influenza A ("A/H1N1" & "A/H3N2") and two kinds of influenza B ("B/Yamagata" & "B/Victoria") can cause illness. Historically, the yearly influenza vaccine that was recommended in children was designed to protect against both kinds of influenza A but only one kind of influenza B. In a series of trials conducted between 2008-09 and 2010-11 (TITRE I, II, and IIB), the TITRE investigators measured antibody response to influenza B in children who were primed with two doses of trivalent inactivated influenza vaccine (TIV) containing B/Yamagata. Overall, the investigators found that 2 doses of vaccine containing B/Yamagata did not adequately prime children for response to the alternate B/Victoria antigen and that subsequent vaccine doses containing B/Victoria-lineage antigen strongly boosted antibodies to the B/Yamagata antigen that was introduced during first immunization priming, but with lower responses to B/Victoria. For the first time since 2009-10, the recommended B/Victoria component of the seasonal influenza vaccine has been changed, from B/Brisbane/60/2008 to B/Colorado/60/2007 for the coming 2018-19 season. The investigators thus have a unique opportunity to clarify lineage-specific influenza B responses in a well-characterized cohort of children originally primed to Yamagata. The investigators' main interest is to assess whether TITRE I children primed with two doses of B/Yamagata in 2008-09 have since or are now capable of achieving a sufficient antibody response to B/Victoria following a single dose of 2018-19 QIV, ten years after their initial TIV B/Yamagata priming exposure.

Danirixin (DNX) is a novel, selective, and reversible antagonist of the C-X-C chemokine receptor (CXCR) 2 and has been shown to decrease neutrophil transmigration and activation to areas of inflammation. An intravenous (IV) formulation of DNX hydrobromide (HBr) is being developed as an anti-inflammatory agent for treatment of adults hospitalized with influenza (IFV). While early therapy with antivirals decreases severity and duration of symptoms of influenza, there are no drugs that have demonstrated clinical efficacy in randomized clinical trials in this population. Current treatment guidelines for hospitalized IFV recommend neuraminidase inhibitors as standard of care therapy. IFV studies in animals have demonstrated that therapeutic treatment with the combination of a CXCR2 antagonist and a neuraminidase inhibitor reduced lung neutrophils and showed trends for improvements in clinical scores, lung function and pathology with no evidence of worsening outcomes, including viral load. This Phase 2, randomized, double-blind (for IV DNX), placebo-controlled (for IV DNX) 3-arm study will be the first study to determine the efficacy and safety of IV DNX when co-administered (in all groups) with standard of care antiviral treatment (open-label oral oseltamivir [OSV]) in subjects hospitalized with IFV. The primary objective of the study is to assess the efficacy of treatment with IV DNX twice daily given with oral OSV compared to oral OSV twice daily on time to clinical response (TTCR). In this study, subjects will be randomized in a 2:2:1 ratio to 15 milligram (mg) free base equivalent (FBE) IV DNX, 50 mg FBE IV DNX, or matching placebo twice daily. All subjects will also receive open-label 75 mg oral OSV, twice daily (given as standard of care). The study treatment duration will be for up to 5 days. The investigator may elect to continue treatment with OSV after 5 days of study treatment. Follow up will continue until Day 45 for all subjects. The study will begin with enhanced safety monitoring in sentinel cohorts, leading to stepwise enrollment of subjects. Subjects will be enrolled based on increasing levels of renal impairment, and less severe hospitalized subjects will be enrolled prior to enrollment of critically ill subjects, as this is the first study conducted in the hospitalized population with severe IFV. Approximately 300 subjects are targeted to be enrolled in the study.