Found 14886 clinical trials
A Study of Immune Responses to the Virus That Causes COVID-19
The purpose of this study is to learn more about the acute response to infection with and recovery from the virus called severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Some people know this virus by the name "coronavirus."
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- 16 Feb, 2024
- 59 locations
Motivations and Barriers to Participating in Ophthalmology Research Projects
The primary objective of this project is to understand the reasons why patients agree / disagree to take part in ophthalmology research. This will be done by asking participants to complete a Research Questionnaire.
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- 05 Aug, 2020
A Study to Assess the Long-Term Safety of Ustekinumab Versus Other Biologics in Patients With Crohn's Disease
The purpose of this study is to estimate and compare the incidence of overall malignancy, serious infection, and opportunistic infections between new users of ustekinumab and new users of other biologic therapies among adult participants with Crohn's disease (CD).
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- 05 Aug, 2020
Application of Serial Body Composition Change for Risk Prediction in Treating Patients With Severe Pneumonia
We hypothesize that serial changes of body composition in patients with pneumonia can help clinician to monitor prognosis. It was associated with underlying immune response.
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- 16 Feb, 2024
- 1 location
Patients Perspectives on Discontinuation of Their Fertility Treatment Due to the COVID-19 Pandemic
The COVID-19 pandemic brought new challenges to our nationwide healthcare system, with rapid escalation of the number of affected individuals over a handful of weeks. From March 13, a first set of measures was taken to minimise the spread of the virus, which largely impacted societal and economical daily life. …
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- 16 Feb, 2024
- 1 location
Persistence of Immunogenicity Following Reduced PCV Dosing Schedules in South African Children
This study will evaluate the persistence of immunogenicity following a reduced dosing schedule of 10- or 13-valent Pneumococcal Conjugate Vaccine (PCV10, PCV13). This is the follow-up of a randomized controlled trial in which children received a single priming dose of PCV10 or PCV13 (at 6 or 14 weeks of age) …
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- 16 Feb, 2024
- 1 location
Brazilian Registry for Clinical Presentation of Individuals With COVID-19 (SARS-Brazil)
This is a registry-based cohort study of all adult patients (18 years) with confirmed or suspected SARS-CoV-2 infection. The main goal is to describe mortality incidence, demographic characteristics, coexisting conditions, treatments, outcomes among SARS-CoV2 infected patients.
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- 16 Feb, 2024
- 9 locations
Outcomes of Elective Cancer Surgery During the COVID-19 Pandemic Crisis
CovidSurg-Cancer is an international, multicentre, observational cohort study designed to evaluate the 30-day COVID-19 infection rates in elective cancer surgery during the COVID-19 pandemic. Centres can elect to include one or more cancer types in the study, in any combination, depending on local expertise and capacity.
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- 16 Feb, 2024
- 1 location
The Malaria Heart Disease Study
The overall hypothesis is that patients who have (i) previously suffered from a malaria infection or (ii) patients with ongoing symptomatic malaria will benefit from having an echocardiogram and blood tests performed as a screening tool to diagnose early cardiac impairment and prevent future cardiovascular disease.
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- 05 Aug, 2020
NCI COVID-19 in Cancer Patients NCCAPS Study
This study collects blood samples, medical information, and medical images from patients who are being treated for cancer and have a positive test for SARS CoV-2, the new coronavirus that causes the disease called COVID-19. Collecting blood samples, medical information, and medical images may help researchers determine how COVID-19 affects …
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- 16 Feb, 2024
- 576 locations