Clinical trials
COVID clinical trials
Below are recruiting covid clinical trials, each written for real people, not researchers. We’re tracking 369 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT04320732Recruiting
Study COVID-19 spread at home and work
This study looks at what factors make COVID-19 spread more easily in the community and workplace. It may help researchers understand how to reduce transmission in everyday settings.
OsloAges 18 years+ - NCT04330521Recruiting
Cancer patients share experiences during the COVID-19 outbreak
This study asks adult cancer patients to complete a survey and talk in an interview about how COVID-19 affected their care and daily life. Your answers may help researchers understand what challenges cancer patients faced during the pandemic.
Stanford, CaliforniaAges 18–99 - NCT04362150Recruiting
Study of long-term effects after COVID-19 infection
This study follows adults who had COVID-19 to learn how the illness can affect health over the long term. It may help researchers understand lasting symptoms and who is at higher risk, which could improve future care.
San Francisco, CaliforniaAges 18–100 - NCT04363541Recruiting
Thermotherapy for mild to moderate COVID-19 symptoms
This trial studies whether local heat treatment (thermotherapy) can improve outcomes for people with mild to moderate COVID-19. It’s designed for people early in their illness (within 5 days) who still have good oxygen levels.
Guadalajara, JaliscoAges 18 years+ - NCT04377490Recruiting
Study of blood clots in hospitalized COVID-19 patients
This study looks at how often blood clot–related problems happen in people hospitalized with serious COVID-19 lung illness. It may help doctors understand risks and improve care for patients in the hospital.
AmiensAges 18 years+ - NCT04382846RecruitingPhase 3
Testing new treatment combinations for COVID-19
This trial studies new drug treatment plans for people who currently have COVID-19. If it works better than standard care, it could improve recovery for patients.
TantaAges 18 years+ - NCT04404062Recruiting
COVID-19 test study using blood and swab samples
This study checks whether different COVID-19 tests (a blood test and swab-based tests) can detect or confirm infection. If you join, you’ll follow the study steps so researchers can compare results and improve testing.
London, LondonAges 5–70 - NCT04427566RecruitingPhase 2
Low-dose radiation to the whole lungs for severe COVID
This Phase 2 study tests whether low-dose whole-lung radiation can improve outcomes for people with severe COVID-19 lung problems who are on ICU breathing machines. It’s designed for patients with new COVID symptoms and low oxygen levels despite critical care.
Columbus, OhioAges 18 years+ - NCT04442191RecruitingPhase 2
Convalescent plasma for hospitalized COVID-19 patients over 40
This trial tests whether donated “recovered patient” plasma (antibodies from people who had COVID-19) can improve outcomes for people hospitalized with COVID-19. It focuses on patients early in their illness who need a small amount of oxygen.
Chicago, IllinoisAges 40 years+ - NCT04448145Recruiting
Study why COVID lasts after recovery
This study looks at what factors may make COVID-19 symptoms or infection effects last after someone has recovered. It also collects certain body samples to better understand why this persistence happens.
New York, New YorkAges 7 years+ - NCT04459689Recruiting
COVID-19 study for people with primary immune deficiencies
This study looks at COVID-19 experiences in people who have a primary immune deficiency (a long-term immune problem) and who have had COVID-19. It may help researchers better understand how COVID-19 affects people with these conditions.
ParisAges birth+ - NCT04474301Recruiting
Quality of life check for people with melanoma during COVID-19
This study looks at how people with melanoma are feeling during the COVID-19 pandemic, including quality of life. You may be asked to share information through surveys or study contact so the researchers can understand needs and concerns.
Houston, TexasAges Any age - NCT04525716Recruiting
Study of how COVID-19 affected surgery patients
This study looks at how the COVID-19 pandemic changed outcomes and experiences for people who had surgery in Stockholm during the study period. It may help hospitals prepare better plans for patients during future outbreaks.
StockholmAges Any age - NCT04551378Recruiting
Study of how COVID affected young people with cancer
This study looks at how the COVID-19 pandemic affected the experiences of teenagers and young adults with cancer, including people who finished treatment. It may help improve support for cancer patients and survivors during public health crises.
Houston, TexasAges 18–39 - NCT04582903Recruiting
Send-in sample collection study for immune response to respiratory viruses
This study collects sent-in samples to better understand how your immune system responds during a COVID-19–like illness and after you recover. It may help researchers learn why some people get sick and others stay uninfected, and how immune protection works over time.
Rockville, MarylandAges 1 day–99 years - NCT04679584Recruiting
Study of long-term effects after COVID-19 infection
This study looks at how COVID-19 can affect health and quality of life over the long term. It may help researchers understand symptoms that can last and what changes people experience after recovery.
Würzburg, BavariaAges 18 years+ - NCT04706390Recruiting
Study compares immune response after COVID infection vs vaccination
This study looks at how your immune system responds after natural COVID-19 infection compared with after COVID vaccination. It may help researchers understand how well different experiences train the body’s defenses.
BergenAges 20–100 - NCT04736732Recruiting
Post-COVID research clinic for adults in Quebec
This study invites adults in Quebec to complete questionnaires and possibly follow-up checks about past COVID-19 infection or symptoms. It may help researchers better understand ongoing effects after COVID, or compare people with different COVID test histories.
Montreal, QuebecAges 18–100 - NCT04746183RecruitingPhase 1/Phase 2
Early trial testing treatments for COVID-19 in the first days
This early-stage study tests COVID-19 treatments in people who have recently developed symptoms and who test positive for the virus. It aims to find safer, more effective options for preventing worsening disease, especially in higher-risk groups.
Cape TownAges 18 years+ - NCT04790240RecruitingPhase 1/Phase 2
Herbal treatment aimed to reduce COVID-19 inflammation
This early-stage trial studies whether certain medical herbs can lower inflammation in people with recent COVID-19 and help the immune system better fight the virus. You may be able to join whether or not you take standard COVID medicines, but you would need to complete the herb plan and provide specific lab and scan results.
Rockville, MarylandAges Any age - NCT04806620Recruiting
Online app study for brain inflammation lifestyle data
This study uses a digital platform (app/website) to collect lifestyle and symptom information to better understand brain inflammation. You may qualify if you have certain conditions like Long COVID, migraines, autoimmune disease, inflammatory gut issues, mood disorders, or if you are a healthy comparison person.
Delafield, WisconsinAges 2 years+ - NCT04834869Recruiting
Track safety after COVID-19 vaccination in adults
This study follows adults who have already received a COVID-19 vaccine to monitor side effects and safety over time. Your participation helps researchers understand how the vaccine affects different people who are at higher risk due to their work.
Philadelphia, PennsylvaniaAges 18 years+ - NCT04858412Recruiting
Amino acid supplement to help people with COVID-19 and alcohol liver disease
This study tests whether an HMB-enriched amino acid supplement can improve outcomes in adults who have COVID-19 pneumonia, especially those with alcohol-related liver disease. The trial compares results in people with alcohol liver disease versus those without, to see if the supplement helps during recovery.
Cleveland, OhioAges 21 years+ - NCT04887623Recruiting
Blood and breathing marker tracking in hospitalized COVID-19
This study follows hospitalized people with recent COVID-19 to see how infection and inflammation markers change over time. It may help doctors better understand what’s happening in the body as breathing problems develop and treatments are given.
Hradec KrálovéAges 18–90
Hear when a new COVID trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
Common questions
- Are there clinical trials for covid?
- Yes. Clin2 currently lists 369 recruiting covid studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a covid trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a covid trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.