Clinical trials · California
Infections clinical trials in California
We’re tracking 160 recruiting infections studies with a site in California — including Phase 1, Phase 1/Phase 2, Phase 2, Phase 3 and Phase 4 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT06738407RecruitingPhase 4
Doxycycline to prevent STIs in high-risk people
This study tests whether taking a daily antibiotic (doxycycline) can prevent sexually transmitted infections in people at high risk. If you've had an STI recently and sometimes have sex without condoms, you might be able to join.
Los Angeles, CaliforniaAges 13–29 - NCT06815536Recruiting
Testing a new test for ciprofloxacin-resistant gonorrhea
This study is testing a new way to quickly check if gonorrhea bacteria are resistant to the antibiotic ciprofloxacin. If you have a positive gonorrhea test, your leftover sample may be used to see if this new test can help guide better treatment.
San Francisco, CaliforniaAges Any age - NCT06817889RecruitingPhase 2
Remdesivir for RSV in people with weak immune systems
This trial tests if remdesivir can safely treat RSV (a respiratory virus) in people with weakened immune systems, such as those who have had a stem cell or bone marrow transplant, CAR T-cell therapy, or are being treated for blood cancer. If you have a confirmed RSV infection in your nose or throat and are at moderate or high risk for complications, you may be able to join.
Duarte, CaliforniaAges 18 years+ - NCT06856174RecruitingPhase 4
Menopause Hormone Therapy for Women with HIV
This trial tests whether hormone therapy can help manage hot flashes and night sweats in women living with HIV who are going through menopause. It's designed to see if this treatment is safe and effective for this group.
Los Angeles, CaliforniaAges 40–60 - NCT06859424RecruitingPhase 2
Testing a new GVHD prevention method after donor stem cell transplant
This trial tests a new way to prevent graft-versus-host disease (a common side effect of stem cell transplant) using a drug called cyclophosphamide after transplant. It is for adults with certain blood cancers who need a transplant from a partially matched unrelated donor.
Palo Alto, CaliforniaAges 18–66 - NCT06998043RecruitingPhase 2
Phage therapy for cystic fibrosis with pseudomonas lung infection
This trial tests a new treatment using phages (viruses that kill bacteria) for people with cystic fibrosis who have a chronic pseudomonas lung infection. It aims to see if adding phages to your usual care can help control the infection.
Palo Alto, CaliforniaAges 18 years+ - NCT07087145Recruiting
HPV test by mail for men with HIV
This trial explores if mailing an HPV self-test kit to your home is a good way to screen for HPV. It's for men over 35 who have sex with men, including trans women, and are living with HIV.
San Francisco, CaliforniaAges 35 years+ - NCT05639647RecruitingPhase 2
Aztreonam plus avibactam for serious gram-negative infections
This trial compares two IV antibiotics (aztreonam and avibactam) against the best available treatment for serious gram-negative infections. It may help people who are hospitalized and need IV antibiotics, especially when the infection is caused by certain gram-negative bacteria.
San Diego, CaliforniaAges 9 months–17 years - NCT06472765Enrolling by invitation
Study of the Vaginal Ecosystem in Healthy Women
This study looks at the natural balance of bacteria and other factors in the vagina of healthy women. It aims to learn more about what a healthy vaginal ecosystem looks like.
Los Angeles, CaliforniaAges 18–89 - NCT06262282Enrolling by invitation
Phage therapy for stubborn NTM infection in cystic fibrosis
This trial tests whether a special virus therapy (phage) can help clear stubborn NTM lung infections in people with cystic fibrosis who have been on antibiotics for over a year without success. Participants will continue their antibiotics while receiving the phages.
Los Angeles, CaliforniaAges 6 years+ - NCT07682961RecruitingPhase 3
Study of new HIV injection vs. standard injectables
This phase 3 trial tests a new long-acting, injectable two-drug combination (lenacapavir + teropavimab + zinlirvimab) vs. another injectable combo (cabotegravir + rilpivirine) for people whose HIV is already well-controlled on daily oral meds. It aims to see if the new combo can keep the virus under control with fewer injections.
San Francisco, CaliforniaAges 18 years+ - NCT06866405RecruitingPhase 3
RSV vaccine boost in a new pregnancy
This study tests whether a second dose of the RSV vaccine during a new pregnancy protects you and your baby from RSV. If you received the RSVpreF or Abrysvo vaccine in a past pregnancy, you may be able to join.
Los Angeles, CaliforniaAges birth+ - NCT06679140RecruitingPhase 3
Study of Ibuzatrelvir for COVID-19 in high-risk patients
This trial tests if a new medicine called ibuzatrelvir can help people with COVID-19 who have certain health risks avoid severe illness. It is for patients who cannot or choose not to take another COVID-19 pill called Paxlovid.
Bakersfield, CaliforniaAges 12 years+ - NCT07650916RecruitingPhase 3
A study of two ultra-long-acting HIV shots
This trial tests a new ultra-long-acting injectable combination of cabotegravir and rilpivirine for people with HIV who already have the virus under control. It aims to see if these shots can keep the virus suppressed with fewer doses.
Bakersfield, CaliforniaAges 12 years+ - NCT07285785RecruitingPhase 4
Rifaximin for children with acute diarrhea
This study tests whether a medicine called rifaximin, taken along with oral rehydration solution, helps children aged 6 to 11 recover faster from acute (short-lasting) diarrhea that is likely caused by a bacterial infection. The study compares rifaximin plus oral rehydration versus oral rehydration alone.
Lynwood, CaliforniaAges 6–12 - NCT07610395RecruitingPhase 2
Testing an oral drug for cold virus in COPD patients
This trial tests an oral medication (VPV) to see if it can safely treat rhinovirus (a common cold virus) in people with COPD. The goal is to help you recover faster and prevent serious COPD flare-ups.
Inglewood, CaliforniaAges 40–85 - NCT07758140Recruiting
At-home cervical cancer screening study
This study tests if women can collect their own samples at home to screen for cervical cancer, which could make screening easier and more comfortable. You would provide a sample and compare it to a standard doctor-collected sample.
Sherman Oaks, CaliforniaAges 25–65 - NCT07214571RecruitingPhase 2
Study of S-337395 for RSV in high-risk adults
This trial tests an experimental drug called S-337395 for adults with RSV who are not in the hospital but are at high risk for severe illness. It aims to see if the drug can help prevent symptoms from getting worse.
Los Angeles, CaliforniaAges 18 years+ - NCT07013474RecruitingPhase 3
Study of ibuzatrelvir for immunocompromised adults with COVID-19
This trial tests an investigational medicine called ibuzatrelvir for adults with COVID-19 who have a weakened immune system. The study aims to see if it helps them recover and avoid severe illness.
Canoga Park, CaliforniaAges 18 years+ - NCT02140255RecruitingPhase 1/Phase 2
Intensive early HIV treatment in newborns to aim for remission
This study gives very early, intensive HIV medicine to infants diagnosed with HIV and follows them closely to see if HIV can go into remission (stop being detectable without ongoing treatment). It may help families understand whether treating right after birth can change a child’s long-term HIV outlook.
La Jolla, CaliforniaAges Up to 2 days - NCT06980480RecruitingPhase 3
Gammagard to prevent infections in multiple myeloma
This study tests if adding Gammagard (a type of antibody therapy) to your multiple myeloma treatment with Tecvayli can help prevent serious infections. You may qualify if you recently started Tecvayli and are still responding to it.
Orange, CaliforniaAges 18 years+ - NCT07645287RecruitingPhase 2
New HIV Combination Therapy for People on Biktarvy
This study tests a new HIV medication (GS-3242) combined with lenacapavir against your current Biktarvy regimen. Both are all-oral treatments for people whose HIV is well-controlled.
Beverly Hills, CaliforniaAges 18 years+ - NCT06785246Enrolling by invitation
Grasshopper dashboard study for chest x-rays
This trial tests a new dashboard tool for radiologists to review chest x-rays ordered during emergency or hospital stays. It aims to improve how scan results are reported and used.
Pleasanton, CaliforniaAges Any age - NCT06428097RecruitingPhase 1
Thyroid hormone before heart transplant
This study tests whether giving a thyroid hormone supplement called levothyroxine before a heart transplant can help with recovery. It is for people already listed for a heart transplant who do not have thyroid problems.
San Francisco, CaliforniaAges 18 years+
Infections trials by city in California
Where these studies are running in California
Institutions with a site for the recruiting infections studies listed above.
- University of California, Los Angeles (UCLA) · 4 studies
- University of California, San Francisco · 4 studies
- 310 Clinical Research · 2 studies
- City of Hope Comprehensive Cancer Center · 2 studies
- Optimus Medical · 2 studies
- San Francisco Department of Public Health · 2 studies
- Stanford University · 2 studies
- University of California San Diego · 2 studies
What taking part in a infections study involves
A screening visit first
Before anything else, the study team checks whether you fit — usually a visit with some tests. You can stop at any point, and screening is typically free.
Care at a nearby site
Study visits happen at a clinic or hospital taking part. Many studies cover the cost of the study treatment and related visits, and some reimburse travel.
You stay in control
Taking part is voluntary and you can leave a study at any time, for any reason, without affecting your regular care.
The team decides eligibility
Our fit check is a helpful first read, not a decision. The study team makes the final call after reviewing your health history.
Infections trials in other states
Common questions
- Are there infections clinical trials in California?
- Yes. We're currently tracking 160 recruiting infections studies with a site in California, each rewritten in plain language so you can see what it's testing and who it's for.
- How do I find out if I qualify for a infections study in California?
- Each study lists its eligibility rules — age, diagnosis, prior treatments. On every trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Do I have to live in California to take part?
- Not necessarily. These studies have a site in California, but eligibility is about your health, not your address — some people travel to take part, and a few studies reimburse travel. The study team can tell you what's required.
- Does it cost anything to join a infections trial?
- Using Clin2 is always free. Many trials cover the study treatment and related visits; some reimburse travel. The study team explains exactly what's covered before you decide.
Not the right time?
New infections studies open in California regularly. Set up a health profile and we’ll quietly watch for studies that fit you and email you when one opens.
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.