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Browse 1,603 clinical trials for covid-19. Find studies that match your criteria and connect with research centers.
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Showing 761-780 of 1,603 trials
NCT04510467
this observational, cross-sectional, national, comparative study, including RMD patients followed in hospital centres of the FAI²R Rare Diseases Healthcare Pathway network and specialist private practitioners caring for patients suffering from inflammatory rheumatism, systemic autoimmune diseases and auto-inflammatory diseases. The objective of the study is to compare RMD patients with COVID 19 infection (cases) to RMD patients who have not had COVID 19 infection (controls) on their mental health.
NCT05367895
This is a retrospective test-negative case-control study of COVID-19 Vaccine (CoronaVac®) manufactured by Sinovac Research and Development Co., Ltd.The main purpose of this study is to measure vaccine effectiveness of homologous booster-dose vaccination with CoronaVac® against laboratory-confirmed symptomatic disease.
NCT05682573
This study is a prospective cohort study aimed to clarify the continuous immune state changes of patients with COVID-19. Investigators include the patients admitted to the hospital within one week after the onset of COVID-19. 10ml of patients' blood was collected day 1, day 7, day 14 , and day 20 after the patients admitted to the hospital. The blood inflammatory factors, immune related molecules, and immune cells were detected to determine the changes of patients' immune status. The impact of immune status changes on prognosis and quality of life in later follow-up period was evaluated by various questionnaires and evaluation scales.