View clinical trials related to Covid19.
Filter by:The aim of the research is to estimate the levels of cellular and humoral immunity to the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) among Moscow residents over 18 years old. During the study, participants will be divided into four groups: healthy volunteers; individuals recovered from coronavirus disease 2019 (COVID-19) with different severity; individuals vaccinated against SARS-CoV-2; individuals who have had COVID-19 concomitantly with comorbidities that characterized by the impact on the immune system (tuberculosis, chronic obstructive pulmonary disease, HIV infection, hematological neoplasia). For all participants included into the study peripheral blood will be collected and the titers of SARS-CoV-2 specific immunoglobulins M (IgM) and immunoglobulins G (IgG), frequencies of the T cells specific to nucleocapsid (N), membrane (M), and spike (S) proteins of SARS-CoV-2 in peripheral blood, as well as the fractions of virus specific T helpers and cytotoxic T cells will be estimated. For smaller cohorts of the participants in all groups the antibody titers and T cell response levels will be examined in dynamics. All participants will be monitored for the incidence of primary or repeated COVID-19 for 1-2 years after inclusion in the study. Based on the results of the study, the relationship between the formation of humoral and cellular immunity against COVID-19, the duration of these types of immunity, as well as their individual contribution to protection against primary or secondary SARS-CoV-2 infection will be analyzed. Additionally, data concerning patients recovered from COVID-19 and having concomitant diseases will provide a valuable information that may help to understand in more details the mechanisms of the development of the SARS-CoV-2 specific immune response.
To investigate the impact of rapid antigen testing for Severe Acute Respiratory Syndrome Corona Virus-2 (SARS-CoV-2), the investigators plan to conduct a large trial to assess the impact of using rapid tests to screen people before participating at a mass gathering event, i.e. a music concert. Among participants who wish to attend and fulfill the inclusion criteria, half will be offered access to rapid testing and concert (provided the test is negative), and the other half will not. Allocation will be by randomisation. A week after the concert both groups will be tested by means of a standard PCR-test.
Our aim in this study is to determine the positive effect of stem cell therapy applied on critically ill patients with coronavirus infection on DNA repair genes. Patients diagnosed with COVID-19 infection are divided into two equal (n:30) groups. Group-1(n/15): Patients in critically ill condition receiving conventional therapy, Group-2 (n/15): Patients in critically ill condition receiving conventional therapy and systemically transplanted MSCs. The DNA repair pathway will be examined as 11 genes in 5 different parts. Investigated parameters: 1. Base excision repair 2. Nucleotide excision repair 3. Recombinational repair 4. Mismatch repair 5. Direct reversal Investigated parameters: broad biochemical analysis, apoptosis, clinical outcome, and mortality rates.
The 'CAPMYKCO' study is a randomized controlled, open-label, single center proof of concept trial. The aim of this study is to evaluate whether a CRP-apheresis in addition to the current standard therapy is intended to mitigate the severity of the disease course of SARS-CoV-2, especially with regard to tissue injury in the lungs, heart and kidneys and their consequences. CRP-apheresis should reduce the necessity and duration of non-invasive/invasive ventilation requirements compared to the control group. The influence of CRP-apheresis on the attenuation of pulmonary, myocardial and/or kidney tissue injury as well as the course of the COVID-19 disease will also be demonstrated by evaluating various biomarkers, several clinical scoring systems, and the duration of intensive care medical treatment.
Spontaneous pneumomediastinum (PMS) is defined as free air within the mediastinum. Spontaneous pneumothorax (PNX) consists of the presence of air inside the pleural space. PMS and PNX may sometimes occur secondly to an underlying pathology, or deriving from a sudden increase in intra-alveolar pressure such as functional alteration such as airway hyperactivity, Valsalva maneuver, cough, barotrauma, and/or volutrauma with consequent rupture of the alveoli and subsequent leakage of air into the mediastinum due to the Macklin effect. The escaping air can then spread inside the pericardium, the peritoneum, the muscles, and subcutaneous tissues, hence causing subcutaneous emphysema. PMS and PNX are rare complications of several lung infections such as Pneumocystis Jirovecii pneumonia, tuberculosis, bacterial necrotizing pneumonia, and herpes pneumonia. However, an increasing number of PMS and PNX has been described in patients with SARS-CoV2 interstitial pneumonia. PMS and PNX can either present as the onset manifestation of COVID-19 disease, or occur as complications of non-invasive and/or invasive ventilation, or following to cystic and/or fibrotic evolution of the pathology. The frequency of PMS and PNX during COVID-19 is not well defined, as the available data are limited to case collections and single reports. According to currently available scientific literature, PNX in COVID-19 occurs with frequency rates of 1-3%, up to 6% in patients undergoing non-invasive ventilation (NIV) and mechanical artificial ventilation (VAM). In McGuinness's analysis, which compared the complications of barotrauma in patients with acute respiratory distress syndrome (ARDS) in VAM, PNX and PMS occurred with frequency rates of 9% and 10%, respectively, while in non-COVID-19 population, PNX and PMS frequency rates were 12% and 3%, respectively.
The investigators want to compare the SARS-CoV-2 incidence 7 days after having been screened negative, between two groups of adults randomized to either go to a concert or not. Participants will be screened via a rapid saliva test a few hours before the show. The hypothesis is that attending a standing concert in respect of safety precaution doesn't increase the risk of SARS-CoV-2 infection.
SARS COV2, the virus that causes COVID-19, was first described in Wuhan, China. For this pathology, which causes severe respiratory infections, preventing the transmission of the virus has become fundamental, that is why vaccines have been developed. In France, this vaccination campaign took place in a context where the lack of confidence in vaccination is high: According to a November 2020 IFOP poll, only 41% of French respondents were willing to be vaccinated against COVID-19. To our knowledge, there are still few qualitative studies on vaccination on the current issue of vaccination against COVID-19.
Is precariousness a risk factor for COVID-19 mortality in intensive care units ? Abstract Background: During the SARS-CoV-2 pandemic, the first wave overwhelmed hospitals in Paris area (Ile-de-France) with a variable impact depending on the territory. Several studies highlighted variable ICU mortality rates during COVID-19 surges across territories (10 to 60%) with higher rates in those most affected by poverty. We assessed the impact of precariousness, as an independent risk factor, on mortality linked to Covid-19 between ICUs at Delafontaine hospital and Ambroise Paré hospital. Method: Investigators carry out a retrospective observational cohort study of consecutive ICU patients aged ≥ 18 years admitted at Delafontaine and Ambroise Paré hospitals during the first wave of the Covid-19 outbreak in order to compare mortality rates according to predefined risk factors (age, diabetes, arterial hypertension, BMI, active solid or haematological cancer, IGS2, poverty rate at the threshold of 60% (%) according to the island grouped for statistical information (IRIS)37 of the patient, invasive ventilation or not) that include precariousness. Results: Conclusion:
Contrasting hypotheses, including that of a protective role of nicotine, have been generated concerning the association between smoking and the occurrence of COVID-19 infection. The question has attracted a lively scientific and public debate. However, the studies conducted so far are based on clinical samples, with a majority of hospital case series, thus most likely suffering from bias due to selection. The investigators propose to conduct an analysis of the potential causal association between smoking or the use of the Swedish smokeless tobacco snus and the occurrence of COVID-19 using data from a newly identified retrospective cohort in Sweden. Information on tobacco use will be extracted by public dental clinic records in Stockholm Region between October 2015 and January 2020. Information on diagnoses of COVID-19 will be obtained through record linkage with health care registers of inpatient and outpatient care during the period February 2020-August 2021. Socio-demographic information will be accrued from the register of the total population in Stockholm Region (Statistics Sweden). The risk of COVID-19 for tobacco users compared to non-tobacco users will be calculated as a measure of association adjusting for potential confounders.
The aim of the study is to gain insight into the rehabilitation process and predictive factors for the outcome after rehabilitation in three patient groups: 1. SARS-CoV-2-positive patients in the isolation ward 2. Post-Covid-19 patients 3. Control group; matched for gender, age and co-morbidity