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COVID-19 and Coronavirus Infections clinical trials in California
12 studies for COVID-19 and Coronavirus Infections are looking for participants at sites in California.
Cities in California
Efficacy and Safety of Tozorakimab in Patients Hospitalised for Viral Lung Infection Requiring Supplemental Oxygen
- Research Site, Fresno
- Research Site, Newport Beach
- Research Site, Torrance
RecruitingPhase 3
Ages 18 and older · All sexes · Updated Oct 2, 2026 · NCT05624450A Study to Learn About the Study Medicine Ibuzatrelvir in Adults With COVID-19 Who Are Severely Immunocompromised
- Hope Clinical Research, Inc., Canoga Park
- Amicis Research Center - Granada Hills, Granada Hills
- Jacobs Medical Center at UC San Diego Health, La Jolla
- and 4 more
RecruitingPhase 3
Ages 18 and older · All sexes · Updated Sep 25, 2026 · NCT07013474Randomized Double-Blind Placebo-Controlled Trial EValuating Baricitinib on PERSistent NEurologic and Cardiopulmonary Symptoms of Long COVID
- University of California, Los Angeles (UCLA), Los Angeles
- University of California San Francisco, San Francisco
RecruitingPhase 3
Ages 18 and older · All sexes · Updated Sep 25, 2026 · NCT06631287A 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
- National Institute of Clinical Research - Bakersfield, Bakersfield
- Velocity Clinical Research, Huntington Park, Huntington Park
- 310 Clinical Research, Inglewood
- and 9 more
RecruitingPhase 3
Ages 12 and older · All sexes · Updated Sep 25, 2026 · NCT06679140Pharmacokinetics, Pharmacodynamics, and Safety Profile of Understudied Drugs Administered to Children Per Standard of Care (POPS)
- Lucile Packard Children's Hospital, Palo Alto
RecruitingObservational studyHealthy volunteers welcome
Ages 0 to 20 · All sexes · Updated Aug 21, 2026 · NCT04278404A Phase 1/2A, Randomized Study of a T Follicular Helper (TFH)-Targeting Genetic Vaccine Strategy Designed to Induce Broad, Durable Immune Responses
- UCLA Westwood, Los Angeles
- UCSF Community and Clinical Research Center, San Francisco
RecruitingPhase 1/2Healthy volunteers welcome
Ages 40 to 64 · All sexes · Updated Aug 18, 2026 · NCT06810934A Study to Learn About a COVID-19 Vaccine in Healthy Adults 18 Through 64 Years of Age
- Diablo Clinical Research, LLC dba Flourish Research, Walnut Creek
RecruitingPhase 4Healthy volunteers welcome
Ages 18 to 64 · All sexes · Updated Aug 7, 2026 · NCT07730450Long-term Impact of Infection With Novel Coronavirus (COVID-19)
- Zuckerberg San Francisco General Hospital (ZSFG), San Francisco
RecruitingObservational study
Ages 18 to 100 · All sexes · Updated Jul 23, 2026 · NCT04362150Phase III DAS181 Lower Tract PIV Infection in Immunocompromised Subjects (Substudy: DAS181 for COVID-19): RCT Study
- City of Hope cancer Center, Duarte
- University of California Davis Health System, Sacramento
RecruitingPhase 3
All ages · All sexes · Updated Jun 23, 2026 · NCT03808922Impact of the Coronavirus (COVID-19) on Patients With Cancer
- Stanford University School of Medicine, Stanford
RecruitingObservational study
Ages 18 to 99 · All sexes · Updated Apr 27, 2026 · NCT04330521Understanding Immunity to the Flu Vaccine in COVID-19 Patients
- Stanford University, Palo Alto
RecruitingObservational studyHealthy volunteers welcome
Ages 9 to 64 · All sexes · Updated Mar 18, 2026 · NCT04579588Impact of Aerosol Box Use During Cardiopulmonary Arrest: A Multicenter Study
- Department of Emergency Medicine, Children's Hospital of Los Angeles, Los Angeles
RecruitingHealthy volunteers welcome
Ages 18 to 60 · All sexes · Updated Sep 5, 2025 · NCT05868239From ClinicalTrials.gov, data retrieved Oct 6, 2026. Each study sets its own eligibility; the study team decides who can join.