View clinical trials related to Covid19.
Filter by:The complex clinical symptoms of post COVID syndrome, especially chronic fatigue, pose a major challenge to patients and to the health care system and are frequently refractory to therapeutic intervention. There is increasing evidence that a dysregulated post-viral immune response may be involved in the pathogenesis of post COVID syndrome. In uncontrolled case studies, an improvement of fatigue symptoms after removing autoantibodies has been reported in post COVID patients. However, there is a lack of prospective, sham controlled studies. We initiate an interventional, randomised, sham treatment-controlled prospective study, the EXTINCT post COVID study, which aims to scientifically test the therapeutic efficacy of an extracorporeal apheresis procedure (immunoadsorption) for the treatment of a well characterized cohort of patients with post COVID syndrome, while at the same time providing basic research evidence for an understanding of the pathogenesis of post COVID syndrome. Thereby, we expect to obtain important insights into the diagnosis, treatment and pathophysiology of post-COVID syndrome.
This study is an adaptive, randomized, double blind, platform trial evaluating promising investigational products (IP) for safety and efficacy as early outpatient treatment and post-exposure prophylaxis for Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2).
Eligible participants were randomly assigned (1:1:1), using block randomization stratified, to either 3 groups. Group 1 will be immunized inactivated SARS-CoV-2 vaccine and varicella vaccine in day 0 followed by measles-mumps-rubella vaccine(MMR) in day 28. Group 2 will be immunized varicella vaccine in day 0 followed by SARS-CoV-2 vaccine and MMR in day 28. Group 3 will be immunized inactivated SARS-CoV-2 vaccine in day 0 followed by MMR and varicella vaccine in day 28. Vaccines were administered 28 days apart, with blood samples taken on day 0 and day 28 before vaccination, and on day 56. Local and systemic symptoms and serious adverse events following immunzation were collected.
We designed this study to examine whether COVID-19 infection could lead to retinal and choroidal microvascular involvement in school-age children (6-18 years) in a pandemic peak in China.
Primary endpoints - Incidence of symptomatic and asymptomatic infection with SARS-CoV-2 and other respiratory viruses as determined by molecular (e.g. PCR) and serological testing - Associations between the magnitude and quality of mucosal and serum antibody responses to SARSCoV- 2 and protection from infection with SARS-CoV-2 - Associations between the magnitude and quality of T cell responses to SARS-CoV-2 and protection from infection with SARS-CoV-2 Secondary endpoints - Secondary attack rate and household cumulative infection rate with SARS-CoV-2, influenza, RSV, and other respiratory viruses - Seroincidence and seroprevalence of SARS-CoV-2 a determined by binding antibodies to SARS-CoV-2 spike and nucleocapsid - Presence of risk factors for symptomatic and asymptomatic infection with respiratory viruses - Antibody and T cell kinetics of SARS-CoV-2 following infection - Associations between the magnitude and quality of antibody and T cell responses to seasonal coronaviruses and protection from infection with SARS-CoV-2 - Associations between infection with non-SARS-CoV-2 respiratory viruses and protection from infection with SARS-CoV-2 - Associations between upregulation of gene expression in the mucosa, including interferon stimulated genes (ISGs), and protection from infection with SARS-CoV-2
In order to investigate whether a germinal center response occurs following vaccine boost and to characterize it based on the type of vaccine received, we aim to analyze Spike and/or RBD-specific germinal center B cells within the draining lymph nodes. To achieve this, we will perform lymph node fine needle aspiration of the draining lymph node in 6 subjects in each study arm, 3 to 6 weeks after the booster vaccine injection.
In this multi-center phase II clinical trial, adults in stable health conditions will be vaccinated twice with either a low dose or high dose of the candidate vaccine MVA-SARS-2-S, or placebo. The aim of the study is to assess the safety and immunogenicity of the candidate vaccine.
The goal of this observational study is to determine if intranasal lavage reduces symptoms in adults with COVID-19. The main question is can a hypochlorous acid solution reduce the symptoms of COVID-19. Participants will asked to do the following: - Irrigate each nostril once a day for ten days with a hypochlorous acid solution. - Write a daily record of the presence or absence of symptoms such as fever, headache, chills, nausea, or change in sense of smell. - After ten days, return the daily log in the mail to the investigator.
The COVID-19 pandemic is a public health concern; for which the WHO recommends protective measures and vaccination. There is inadequate data on the impact of COVID-19 vaccination and control measures in Africa. This survey is collecting data about people's knowledge, attitude and compliance regarding COVID-19 disease and vaccines.
The aim of this study is; To Assess the association between periodontal health and Matrix metalloproteinase-8 (MMP-8) level in Gingival Crevicular Fluid (GCF) in post COVID-19 patients.