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Clinical Research Directory

Browse clinical research sites, groups, and studies.

4 clinical studies listed.

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SARS-CoV 2

Tundra lists 4 SARS-CoV 2 clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.

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RECRUITING

NCT07224490

Kisspeptin to Quantify GnRH Neuronal Function in Health and Disease

The objective of this protocol is to use a case-control paradigm to compare the response to an intravenous administration of kisspeptin in individuals with and without post-covid-19 syndrome. The study subjects will receive a single bolus of kisspeptin. This study will utilize the technique of frequent blood sampling (q10 minutes) to provide detailed neuroendocrine characterization of endogenous LH secretion before and after kisspeptin administration. This frequency of blood sampling is required to define the features of LH pulses.

Gender: All

Ages: 18 Years - 60 Years

Updated: 2026-03-31

1 state

Reproductive Disorder
Neurodegeneration
SARS-CoV 2
RECRUITING

NCT04448145

Determinants of SARS (Severe Acute Respiratory Syndrome)-COV2 (COVID-19) Persistence After Convalescence

The 2019-2020 COVID-19 pandemic is the largest outbreak in recent history. It is not known how long after someone gets sick with COVID-19 and recovers that they can still infect other people. It is also not known how quickly people make antibodies against the virus, which help clear infection from the body. The investigators will enroll 300 people who had COVID-19 based on lab testing or confirmed exposure to participate. An additional 25 participants who have never tested positive for COVID and have not had the vaccine will be enrolled as negative controls. Participants will complete a survey at enrollment. The investigators will also collect blood, nose swab, saliva, stool, semen, and breast milk to test for the virus. The investigators will ask participants to complete a survey and give specimens up to 12 times over 24 months. This information will be used to study how long the virus can live in different parts of the body, antibody development, and post-infectious complications. The investigators hope that this information will allow medical and public health providers to make recommendations to better care for patients in the convalescent phase of COVID-19 infection.

Gender: All

Ages: 7 Years - Any

Updated: 2025-11-05

1 state

COVID-19
Corona Virus Infection
SARS-CoV 2
ACTIVE NOT RECRUITING

NCT04568148

COVID-19 Biorepository

Establish a COVID-19 biorepository to aid in developing our knowledge of the disease.

Gender: All

Ages: 18 Years - Any

Updated: 2025-08-01

1 state

Covid-19
SARS-CoV 2
Coronavirus
+1
ACTIVE NOT RECRUITING

NCT04853004

Current and Past SARS-CoV-2 Infection and COVID-19 in Healthcare With Regard to Vaccinations

To investigate the incidence of SARS-CoV-2 infections after vaccination, to monitor the development of SARS-CoV-2 antibody levels after vaccination and to compare this in relation to both previous health \& disease, previous antibody responses and in relation to future disease occurring after vaccination.

Gender: All

Ages: 18 Years - 99 Years

Updated: 2025-03-20

SARS-CoV 2