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COVID19 Paid Clinical Trials in California
A listing of 49 COVID19 clinical trials in California actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
1 - 12 of 49
The state of California currently has 49 active clinical trials seeking participants for COVID19 research studies. These trials are conducted in various cities, including Los Angeles, San Francisco, San Diego and Sacramento.
Featured Trial
Paid Clinical Studies Nationwide
Recruiting
Nationwide clinical trials offered in your area. Some trials offering up to several thousand dollars in compensation for participation.
Featured Trial
Chronic Cough Research Study
Recruiting
Are you tired of living with chronic cough? Our research study is now looking to enroll people from all backgrounds to help research potential new treatment options for chronic cough.
You are under no obligation to take part and health insurance is not required. Find out more today! We’d love to hear from you!
You are under no obligation to take part and health insurance is not required. Find out more today! We’d love to hear from you!
Conditions:
Chronic Cough
Refractory or Unexplained Chronic Cough
Cough
Asthma
Sinusitis
Featured Offer
Lose Weight with GLP-1 Medications
Recruiting
Policy Lab has partnered with OnlineSemaglutide.org to offer trusted access to semaglutide and other GLP-1 medications, including generic alternatives to Ozempic® and Wegovy®.
GLP-1 medications are scientifically backed to help individuals achieve significant weight loss—on average, 15-20% of body weight within a year.
As a valued user, you’re eligible for $100 off your first program with code policy-lab-100.
GLP-1 medications are scientifically backed to help individuals achieve significant weight loss—on average, 15-20% of body weight within a year.
As a valued user, you’re eligible for $100 off your first program with code policy-lab-100.
Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid Obesity
Featured Trial
Depressive disorder Clinical Study
Recruiting
A clinical study for people that suffer with Depressive disorder
Conditions:
Depressive disorder
A Study to Learn About a Study Medicine Called Ibuzatrelvir in Adult and Adolescent Patients With COVID-19 Who Are Not Hospitalized But Are at Risk For Severe Disease
Recruiting
The purpose of the study is to evaluate whether ibuzatrelvir is effective and safe in adults and adolescents with COVID-19 who do not need to be in the hospital but who are at high risk for progression to severe disease. Eligible participants will be randomly assigned (by chance) to receive ibuzatrelvir or matching placebo orally for 5 days. Co-administration of locally available standard of care is allowed. The total duration of the study is around 6 months.
Gender:
ALL
Ages:
12 years and above
Trial Updated:
08/13/2025
Locations: National Institute of Clinical Research - Bakersfield, Bakersfield, California +10 locations
Conditions: COVID-19 SARS-CoV-2 Infection
A Study to Examine Anktiva for the Treatment of COVID-19.
Recruiting
This study will examine the safety and effectiveness of Anktiva in treating patients with Long COVID-19 which is defined as persistent symptoms of a COVID-19 infection that remain after the infection is over.
Gender:
ALL
Ages:
Between 18 years and 70 years
Trial Updated:
08/13/2025
Locations: Chan Soon-Schiong Institute for Medicine (CSSIFM), El Segundo, California
Conditions: Long COVID, Long COVID Syndrome, Long Covid 19
RECOVER-SLEEP: Platform Protocol
Recruiting
The platform protocol is designed to be flexible so that it is suitable for a range of study settings and intervention types. Therefore, the platform protocol provides a general protocol structure that can be shared by multiple interventions and allows comparative analysis across the interventions. For example, objectives, measures, and endpoints are generalized in the platform protocol, but intervention-specific features are detailed in separate appendices.
This platform protocol is a prospect... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/12/2025
Locations: Stanford University, Palo Alto, California +1 locations
Conditions: Long COVID, Long COVID-19, Hypersomnia, Sleep Disturbance
A Clinical Study of Molnupiravir to Prevent Severe Illness From Coronavirus Disease 2019 (COVID-19) in People Who Are High Risk (MK-4482-023)
Recruiting
Researchers are looking for other ways to prevent severe illness from COVID-19. COVID-19 is a virus that most often causes mild flu or cold-like symptoms. However, people with certain health conditions or other factors have a high risk (chance) of getting severely ill from COVID-19, which can require a hospital stay or lead to death. Some people who are high risk for severe illness may be unable to take certain treatments for COVID-19 because they are not available to them, or they take other me... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/12/2025
Locations: Clinica de Salud del Valle de Salinas ( Site 3825), Castroville, California +7 locations
Conditions: Coronavirus Disease (COVID-19)
A Study to Learn About the Study Medicine Ibuzatrelvir in Adults With COVID-19 Who Are Severely Immunocompromised
Recruiting
This is a Phase 3, randomized, actively controlled, double-blinded, double-dummy, superiority study to evaluate the efficacy and safety of ibuzatrelvir alone and in combination with remdesivir IV compared to remdesivir IV alone for the treatment of symptomatic COVID-19 in severely immunocompromised adult participants who are non-hospitalized or are hospitalized for observation but do not require supplemental oxygen for COVID-19.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/07/2025
Locations: Hope Clinical Research, Inc., Canoga Park, California +1 locations
Conditions: COVID-19 Infection
Strategies and Treatments for Respiratory Infections & Viral Emergencies (STRIVE): Shionogi Protease Inhibitor (Ensitrelvir)
Recruiting
Treatments are needed to improve outcomes among patients hospitalized for COVID-19, including direct-acting antiviral (DAA) agents to mitigate the pathology driven by ongoing viral replication. This trial will evaluate S-217622 (ensitrelvir), an anti-SARS-CoV2 3C-like protease inhibitor (PI) developed by Shionogi \&; Co. Ltd.
The study design is a randomized, placebo-controlled, multi-center international clinical trial that will evaluate the clinical efficacy of ensitrelvir when given in addit... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/06/2025
Locations: UCSF Fresno (Site 203-005), Fresno, California +16 locations
Conditions: COVID-19
A Phase 1/2A, Randomized Study of a T Follicular Helper (TFH)-Targeting Genetic Vaccine Strategy Designed to Induce Broad, Durable Immune Responses
Recruiting
The goal of this clinical trial is to test two investigational COVID-19 booster vaccines, called CoTend-s3BXBB and CoTend-BXBB, in healthy volunteers ages 40-64. The CoTend-s3BXBB vaccine includes a component called "s3", which was designed to improve the body's response to the vaccine. CoTend-BXBB is the same vaccine without s3.
The main questions the study aims to answer are: 1) Is the investigational vaccine safe? 2) Does "s3" lead to bigger, broader, and longer-lasting responses to the vacc... Read More
Gender:
ALL
Ages:
Between 40 years and 64 years
Trial Updated:
08/06/2025
Locations: UCLA Westwood, Los Angeles, California
Conditions: COVID-19
NE3107 in Adults With Neurological Symptoms of Long COVID
Recruiting
Long COVID is a condition where debilitating symptoms can persist for months after a COVID-19 infection. This study aims to evaluate the effects of NE3107 on several neurological symptoms reported in people with Long COVID including difficulty concentrating or remembering things ("brain fog") and fatigue.
Researchers will compare NE3107 to a placebo (a look-alike substance that contains no drug) to see if NE3107 works to treat neurocognitive and fatigue symptoms of long COVID.
Participants wil... Read More
Gender:
ALL
Ages:
Between 18 years and 64 years
Trial Updated:
08/01/2025
Locations: Clinical Trial Site, San Francisco, California
Conditions: Long COVID
A Pilot rTMS Trial for Neuropsychiatric Symptoms of Long-COVID
Recruiting
This is a pilot randomized trial of rTMS for symptoms of fatigue and brain fog, and other neuropsychiatric symptoms of Long-COVID (Post-COVID, post-acute sequelae of COVID-19 infection, PASC). Twenty participants diagnosed with Long-COVID and recruited from the UCLA Long-COVID clinic will be randomized to receive active rTMS versus sham stimulation for 15 treatments followed by another 15 open-label rTMS treatments. Investigators will compare the safety and tolerability of rTMS vs Sham and exami... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/31/2025
Locations: UCLA Semel Institute, Los Angeles, California
Conditions: Long Covid-19, PASC Post Acute Sequelae of COVID 19, Brain Fog, Fatigue
A Study to Learn About COVID-19 RNA-Based Variant-Adapted Vaccine Candidate(s) Against SARS-CoV-2 in Adults, Including Those at Higher Risk of Severe COVID-19
Recruiting
The purpose of this study is to learn about the safety, tolerability, and immunogenicity of an updated vaccine against COVID-19.
This study is seeking participants 18 through 64 years of age who are considered to be at higher risk for severe COVID-19 disease per study protocol and those 65 years of age and older. All participants in this study will receive 1 shot to their arm of a BNT162b2 (Omi LP.8.1) 30 µg RNA-based vaccine which targets a circulating variant of SARS-CoV-2 and is selected for... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/30/2025
Locations: Diablo Clinical Research, Inc., Walnut Creek, California
Conditions: COVID-19, SARS-COV-2 Infection
COVID-19 Vaccines International Pregnancy Exposure Registry
Recruiting
The objective of the COVID-19 Vaccines International Pregnancy Exposure Registry (C-VIPER) is to evaluate obstetric, neonatal, and infant outcomes among women vaccinated during pregnancy with a COVID-19 vaccine.
Specifically, the C-VIPER will estimate the risk of obstetric outcomes (spontaneous abortion, antenatal bleeding, gestational diabetes, gestational hypertension, intrauterine growth restriction, postpartum hemorrhage, fetal distress, uterine rupture, placenta previa, chorioamnionitis, C... Read More
Gender:
FEMALE
Ages:
Between 18 years and 50 years
Trial Updated:
07/28/2025
Locations: Pregistry, Los Angeles, California
Conditions: Covid19
COVID-19 International Drug Pregnancy Registry
Recruiting
The objective of the COVID-19 International Drug Pregnancy Registry (COVID-PR) is to evaluate obstetric, neonatal, and infant outcomes among women treated with monoclonal antibodies or antiviral drugs indicated for mild, moderate, or severe COVID-19 from the first day of the last menstrual period (LMP) to end of pregnancy. For monoclonal antibodies, the exposure period also includes 90 days prior to the first day of the LMP.
Gender:
FEMALE
Ages:
Between 18 years and 50 years
Trial Updated:
07/28/2025
Locations: Pregistry, Los Angeles, California
Conditions: Covid19
1 - 12 of 49