View clinical trials related to Covid19.
Filter by:There are very few long-term studies that analyze the immune responses in patients recovered from COVID-19 caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The main aim of this study is to analyze the clinical profile and immune responses of recovered COVID-19 patients in a representative cohort of people in the Umbria region of Italy. The participants had a history of testing positive for SARS-CoV-2 in March 2020 by Reverse Transcriptase- Quantitative Polymerase Chain Reaction (RT-qPCR). The participants were invited for voluntary participation in a seroprevalence study. This study analyzes longitudinally the presence of antibodies against SARS-CoV-2 by sequential serological tests at different time points using two FDA-approved Immunoassays. At the first serum sample collection, the participants were asked to provide information about their COVID-19 clinical history including clinical profile, co-morbidities, and treatment undertaken using a standardized questionnaire. Successive sequential serological assessments were conducted to understand the immune responses in these recovered patients. Moreover, stage two of the study involves, analysis of antibody titers in recovered vaccinated individuals and their follow-up.
Immunodeficiency associated with human immunodeficiency virus (HIV) infection could predispose people living with HIV/AIDS (PLHA) to defective serological responses following infection or vaccination. To evaluate the health outcomes of coronovirus disease-2019 (COVID-19) and HIV co-infection, PLHA and HIV-uninfected persons in Hong Kong are invited to join a study for understanding their clinical characteristics and for tracking their levels of antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) over a one-year observation period after infection or vaccination. The results could inform the development of prevention and control strategy for PLHA in response to the emerging coronavirus threats.
Healthcare workers (HCWs) play a vital role in determining the success of vaccination programs. Patient acceptance and vaccination rely greatly on the utilization and attitude of HCWs towards the vaccine, their attitude also influences patients' adherence to vaccination schedules and their hesitancy. HCWs themselves can be hesitant about a certain vaccine and thus can transfer their negative attitudes to their patients, increasing vaccine hesitancy among the general population. Frontline HCWs are at an increased risk of exposure to COVID-19 due to their direct contact with their patients, working hours, psychological stress and job burnout, they also face stigma. Dental health professionals in particular are at an increased risk due to their occupational hazards that include continuous exposure to body fluids and aerosols, this increases their risk of contracting COVID-19. Therefore vaccinating healthcare workers will be beneficial, not only for themselves, but also for their households and patients.
Follow-up study of Coronavirus disease 2019 (COVID-19) survivors has rarely been reported. We aimed to investigate longitudinal changes in the characteristics of COVID-19 survivors after discharge.
A prospective, longitudinal cohort study designed to follow-up on 500 Swiss military personnel who tested in 2020 for SARS-CoV-2 (regardless of whether positive or negative, but with a known test result). Participants are invited to undergo an intensive test battery to evaluate if they suffer COVID-19 sequelae. The testing will include evaluation of several body systems (cardio-vascular, pulmonary, neurological, ophthalmological, psychological and general) and male fertility in a voluntary subgroup. Immune markers and SARS-CoV-2 reinfection rates will also be evaluated. The study hypothesis is that SARS-CoV-2 infection causes a multi-system disease with sequelae detectable in a significant proportion of army recruits after infection with SARS-CoV-2.
Covid-19 outbreak has caused death of millions of people because of not only the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection itself but also infection dependent complications. Abnormalities in thrombotic events leads to some of these complications which eventually result in emboli. The endothelial damage caused by the virus interacting with ACE2 on the host cells leads to the activation of coagulation cascade. Accumulation of byproducts of the cascade might have some roles in embolism inducing risk of organ damage, other life-threatening problems, and even death. To enlighten the factors triggering embolism, the investigators have focused on genetic changes such as polymorphisms and mutations in certain genes in DNA samples coming from intensive care unit (ICU) patients.
This study is a prospective observational cohort study of 6 and 12 months long-term outcome of Danish speaking patients with COVID-19.
The purpose of this study is to test if senescent cells and their secretome contribute to Long-Hauler Syndrome and if a clinical trial of senolytic drugs, which selectively eliminate senescent cells, should be initiated.
Point-of-care testing can provide an additional layer of protection to reduce transmission of COVID-19 safely and effectively in the population, and if such tests can be self-administered, barriers to access may be reduced. The investigators will conduct a study among those self-identifying as asymptomatic for COVID-19 to evaluate the reliability and feasibility of self-administration of a point-of-care nasal swab test, determine the sensitivity and specificity of the point-of-care nasal swab test relative to reverse transciptase polymerase chain reaction (RT-PCR) testing, and gather quantitative and qualitative data on the acceptability and self efficacy of self-administration.
There are relevant questions that need to be answered about the effectiveness and safety of COVID-19 vaccines. The objective of this observational study is to follow up the clinical outcomes after vaccination in all the headquarters of the National University of Colombia. It is a project that is considered institutional importance and is part of the actions that the National University of Colombia has proposed to the national government to accompany the national vaccination program. The proposed follow-up includes the sociodemographic, cultural, clinical and pharmacological characterization of the vaccinated population, including the report of adverse events occurring after the vaccination process, the behavior of the population after the administration of the vaccine, monitoring serological outcomes, identification of medication errors and therapeutic failure. Three stages are proposed in which the population affiliated to UNISALUD is gradually included, then the beneficiaries and later the student community and their families. The scope of the attached protocol includes Stage I, which corresponds to teachers and administrative staff (active and retired) linked to UNISALUD.