Active clinical trials for "COVID-19"

Multiple Sclerosis (MS) is a demyelinating auto immune disease of the central nervous system, affecting 2500000 people worldwide. Risk factors for MS severity are not yet well-known , but previous studies highlighted that relapse rate increased during influenzae epidemics, and air pollution could be a risk factor for MS relapses. MS is a neurological chronic disease that requires constant medical treatment and regular rehabilitation care. COVID-19 pandemic and restrictive measures taken to limit contaminations have drastically decreased air pollution and seasonal viral infections exposure, but sanitary crisis also limited care access for MS patients (medical treatment, rehabilitation). Therefore, this particular period offers a unique opportunity to evaluate the impact of air pollution, viral infections, and health care access on the severity of MS. The main objective is to evaluate the impact of air pollution and seasonal viral infections on the risk of MS relapse, using the year 2020 as a quasi-experimental model. The secondary objective will be to evaluate the impact of health care access limitations on the risk of neurological disability accumulation. This study will include 1500 MS patients, living in Ile de France, followed in the neurological department of "Pitié-Salpêtrière" Hospital. This is a retrospective observational study nested in OFSEP registry (French Multiple Sclerosis Observatory), which is a prospective cohort of MS patients in France. Air pollution data will come from AIRPARIF, and viral infections data will come from "Santé Publique France". A better knowledge of the impact of air pollution, viral infections, and health care access on the course of MS will enable to better guide information to patients and public health care decisions.

This is randomized, blinded and controlled design. Among the randomly selected subjects who have been vaccinated with two doses of Inactivated COVID-19 vaccine (Vero cell), based on a step-wise approach, the subjects will receive one dose of recombinant COVID-19 vaccine sequentially at different shedules of 1-3 months, 3-6 months and ≥ 6 months after two doses of vaccination, and the subjects vaccinated at different schedules will be randomly assigned to different sequential immunization groups. At the same time, each sequential immunization group will be matched with a control group with the inactivated COVID-19 vaccine (vero cells) as the booster dose.

This is an interventional new drug clinical trial for a Phase 2 randomized, double-blind, and placebo control study using intravenous injection of allogeneic adipose stem cells (Celltex AdMSCs) for subjects with severe COVID-19.

SARS-CoV2 is responsible for a pandemic that has been evolving for approximately 18 months. The virus' capacity for dissemination and its virulence are responsible for significant morbidity and mortality. The initial lack of knowledge of the pathogen and of the pathophysiology underlying the potential severity of the disease, particularly in the respiratory tract, led to numerous therapeutic attempts in this emergency context, centered on the control of an obviously exaggerated inflammatory response. A large number of studies remained of insufficient quality to lead to relevant and applicable conclusions. Secondly, the benefit of corticosteroid therapy has been demonstrated in two trials. Although Dexamethasone remains the only corticosteroid to improve survival, these results have reinforced the hypothesis of the interest of treatments reducing the inflammatory response, particularly cytokine. The widespread use, in the absence of scientific data, of interleukin-6 receptor inhibitors (Sarilumab and Tocilizumab) has been structured around studies whose results remain uncertain to this day because of the heterogeneity of the population treated and the results observed. A possible survival benefit seems to emerge for resuscitation patients who have not yet required invasive ventilation, the other situations being probably associated with the absence of effect or even the potential danger of this treatment. Tocilizumab is notably associated in the literature with the risk of secondary infections and mucosal healing abnormalities, favoring bleeding complications and digestive perforations. The objective of this study is to evaluate the risk of digestive complications (hemorrhage, perforation, diverticulitis) and infectious complications related to the use of Tocilizumab according to the severity of the patients.

A subset of patients diagnosed with severe acute respiratory syndrome (SARS)-CoV2 infection present with lymphopenia. The degree of lymphopenia, and in particular reduced cluster of differentiation (CD)8+ T-cell numbers, is correlated with clinical deterioration and intensive care unit (ICU) admission. The underlying reasons for lymphopenia in coronavirus disease (COVID)-19 is currently unclear, We aim to assess differences in the in vivo distribution of CD8+ T-cells in patients with proven SARS-CoV2 presenting with lymphopenia or with normal lymphocyte counts, using Zirconium-89 ([89Zr])Df-IAB22M2C positron emission tomography (PET) imaging.

The study will evaluate the immunogenicity, safety and efficacy of vaccines against severe acute respiratory syndrome corona virus 2 (SARS-CoV-2) in oncohematological patient population and compare the results with patients without prior oncohematological disease. The study is comprised of retrospective and prospective parts. In retrospective part, biobanked residual biological patient material and data will be used. In prospective part, vaccinated oncohematological patients and vaccinated patients without prior oncohematological disease will be invited to participate in long-term follow-up. The subjects will be invited for blood sample collection every three months from the second vaccine dose administration, i.e. 3 mos., 6 mos., 9 mos. etc. When the study subject receives booster dose, additional blood samples for immunogenicity analyses will be collected up to 14 days before and 4-8 weeks after the booster vaccine dose. The follow-up time points occurring every three months will be counted from the last vaccine's dose. Ten time points in total will be collected and tested for humoral and cellular immunogenicity. For safety analysis patient self-documented systemic events (fever, fatigue, headache, chills, vomiting, diarrhea, new or worsened muscle pain, and new or worsened joint pain) occurring up to 7 days following each vaccine dose will be systematized and compared between oncohematological patients and healthy individuals. For efficacy analysis, polymerase chain reaction assay (PCR) confirmed symptomatic disease rates, hospitalization rates and mortality rates will be assessed.

Widespread testing and contact tracing are critical to controlling the COVID-19 epidemic. Distribution of COVID-19 self-test kits can augment public health contact tracing efforts, as individuals with COVID-19 can distribute self-testing to close contacts. This approach can increase case detection by facilitating testing among exposed individuals, and potentially ameliorate stigma, fear, and medical mistrust associated with COVID-19 among vulnerable populations. The central hypothesis of this study is that distribution of SARS-CoV-2 self-tests to close contacts of among individuals with COVID-19 infection can increase case detection compared with a standard contact referral strategy.

Fatigue and exercise intolerance after survived COVID-19-infection might be related to weakness of the respiratory muscles especially following invasive mechanical ventilation in the Intensive Care Unit. The aim of the project is to measure respiratory muscle function and strength in our respiratory physiology laboratory (Respiratory Physiology Laboratory, Department of Pneumology and Intensive Care Medicine, Head: Professor Michael Dreher) in patients who survived a severe COVID-19-infection (25 with a severe course requiring mechanical ventilation in the intensive care unit, 25 with a moderate-severe course requiring administration of supplemental oxygen only, respectively). Based on this data the aim is to develop a model which determines the severity, pathophysiology and clinical consequences of respiratory muscle dysfunction in patients who had been hospitalised for COVID-19. This will potentially prove the importance of a dedicated pulmonologic rehabilitation with respiratory muscle strength training in patients who had been hospitalised for COVID-19.

This is an observational cohort study to evaluate real-world vaccine effectiveness and durability of Moderna COVID-19 vaccine among a diverse population at Kaiser Permanente Southern California (KPSC). The primary objective of this study is to evaluate the vaccine effectiveness (VE) of receipt of Moderna COVID-19 vaccine in preventing SARS-CoV-2 infection and severe COVID-19 disease. SARS-CoV-2 infection will be defined as a positive antigen test result as well as a positive molecular diagnostic test among symptomatic or asymptomatic participants or a COVID-19 diagnosis code. Severe COVID-19 disease will be defined as COVID-19 hospitalization or mortality.

The COVID-19 Pandemic is the characterizing worldwide wellbeing emergency within recent memory. Since its development in Asia before the end of last year, the infection has spread to each mainland with the exception of Antarctica. Countries are dashing to moderate the spread of the illness by testing and treating patients, completing contact following, restricting travel, isolating residents, and dropping huge social occasions like games, shows, and educational institutes. As almost every institution was closed for the safety of human kind. All educational institutes were also closed for any kind of education. Also, In Pakistan all educational institutes were closed since march 2020. It was impossible to keep educational activities closed for long. In order to keep educational activities in working e-learning was introduced through out the world. As many other countries Pakistan also started e-learning for all students.