Active clinical trials for "Influenza, Human"

The primary objectives of this study are to evaluate the humoral immunogenicity of mRNA-1010 relative to that of an active comparator against vaccine-matched influenza A and B strains at Day 29 and to evaluate the safety and reactogenicity of mRNA-1010.

Influenza infection in solid organ transplant recipients is associated with increased morbidity and mortality compared to non-transplanted controls, due in part to the effects of immunosuppression which is necessary to prevent rejection of the transplanted organ. However, transplant patients are less likely to produce antibodies when vaccinated and when they do, the peak and duration of antibody responses are reduced compared to healthy controls. There are considerable differences in the magnitude of these responses, reflecting variability in individual responses to the influenza vaccine and to the immunosuppression regimen. The investigators hypothesize that chimeric kidney transplant recipients off of immunosuppression will have post vaccine immune responses that are comparable to age and gender matched healthy controls.

This study is designed as an international prospective, multicentric, clinical study to investigate the performance and usability of the Panbio™ COVID-19/Flu A&B Rapid Panel Professional Use and Self- Test devices for the qualitative detection of COVID-19 antigen, Influenza A antigen and Influenza B antigen in human nasopharyngeal (NP) and mid-turbinate nasal swabs, respectively. This study is part of the performance evaluation to support the CE conformity assessment procedures.

This study is designed as an international, prospective, multicentric, clinical study to investigate the performance of the Panbio™ COVID-19/Flu A&B Rapid Panel for the qualitative detection of COVID-19 antigen, Influenza A antigen, and Influenza B antigen in human mid-turbinate nasal swabs collected by a trained health worker. This study is part of the performance evaluation to support the CE conformity assessment procedures.

The purpose of this study is to develop a nasal model for influenza infection using the live attenuated influenza vaccine (LAIV). The investigators will administer LAIV to healthy adult volunteers in order to simulate influenza infection, and obtain nasal specimens to measure influenza virus and inflammatory/immune responses. In a subset of participants, cystic fibrosis transmembrane conductance regulator (CFTR) function will also be evaluated via measurement of nasal potential difference (NPD)

This study is designed as a prospective, multicentric, sample collection study. The collected samples will be used for diagnostic research, product development and validation of the Panbio™ COVID-19/ Flu A&B Rapid Panel for the qualitative detection of COVID-19 antigen, Influenza A antigen (H1N1 and H3N2), and Influenza B antigen in human nasal and nasopharyngeal swabs by the study sponsor, Abbott.

A Multicenter Study Conducted to Evaluate the Performance of the LumiraDx Influenza A/B + RSV Test at Point of Care Testing Sites

This is a comparative prospective diagnostic accuracy study reported according to the STARD guidelines. Citizens at an outpatient COVID19 test facility at Testcenter Danmark Valby will be invited to participate in the study on a volunteer basis. The enrolled participants will have the planned oropharyngeal swab performed in the test center and sent for a SARS-CoV-2 RT-PCR test at TestCenter Danmark, Statens Serum Institut, Copenhagen, Denmark as usual. Besides the planned oropharyngeal swab performed in the test center, the participants will have additional specimens collected in form of saliva, nasopharyngeal-, nasal-, and oropharyngeal swabs. These will all be used for the detection of nucleic acids from the four most common strains of influenza (B Yamagata, B Victoria, A H1N1 and A H3N2), SARS-CoV-2 and RSV A/B. Further we will measure immune mediating cytokines, chemokines, and interleukins in the different specimens. These analyses will be performed at Technical University of Denmark (DTU).

This randomized, active comparator trial will compare the clinical efficacy of recombinant influenza vaccine (RIV) to standard-dose egg-based inactivated influenza vaccine (SD IIV) among adults aged 18-64 years. The primary study hypothesis is that the clinical efficacy of RIV is superior to that of SD IIV to prevent and attenuate influenza-like illness (ILI)-associated influenza virus infection. Relative efficacy will be assessed by comparing rates of ILI-associated reverse transcription polymerase chain reaction (RT-PCR)-confirmed influenza virus infection and measures of infection and illness attenuation among participants who receive RIV versus SD IIV. A secondary hypothesis is that humoral and cell-mediated immune responses to RIV are superior to responses to SD IIV. Relative immunogenicity will be assessed by comparing markers of humoral and cell-mediated immune responses post-vaccination among a subset of participants who receive RIV versus SD IIV.

This study evaluates the immunogenicity of adding inactivated influenza vaccine with southern hemisphere (SH) formulation to standard once-annual influenza vaccination with northern hemisphere (NH) formulation in older adults in Hong Kong over 9 years. Half of participants will receive twice-annual influenza vaccination with NH and SH formulation, while the other half will receive once-annual influenza vaccination with NH formulation and a placebo.