Clinical trial for Influenza
Official title A/Texas Flu Challenge
ClinicalTrials.gov ID: NCT06753474
What this study is testing
What is Influenza Virus influenza A H3N2 strain?
Influenza Virus influenza A H3N2 strain is an investigational medicine, being studied as a potential treatment for influenza.
Also referred to as RG-A/Texas/71/2017 H3N2.
Plain-language explanation of the investigational treatment. It is being studied and is not an approved or proven therapy. The study team can confirm the details.
- What it's testing
- The study aims to learn how the immune system reacts to flu and how the virus spreads, and to check the safety of this flu challenge.
- Who it's for
- Healthy adults ages 18 to 49 who meet the study’s screening criteria.
- What's involved
- Participants will receive a flu virus via a nasal spray or exposure to infected volunteers, stay in the hospital for 8‑12 days for observation, and then attend follow‑up clinic visits with tests and questionnaires.
- Time commitment
- The study lasts about 5 months, including an 8‑12 day inpatient stay and several outpatient visits.
- Phase 1: an early, usually small safety study
- Time commitment: about 5 months
A plain-language read of the study's public ClinicalTrials.gov listing. The study team confirms the details.
Who can take part
Ages 18 to 49. Healthy volunteers may be eligible.
You may be able to join if
- Can understand and comply with all planned study procedures.
- Healthy, non-pregnant, non-breast-feeding persons aged ≥18 and ≤49 years of age inclusive at the time of challenge.
- Persons biologically able to become pregnant must be practicing abstinence or using an acceptable method of birth control for at least 30 days before...
- A person is considered of childbearing potential unless post-menopausal (absence of menses for ≥1 year) or surgically sterilized (tubal...
- Acceptable contraception methods for persons of childbearing potential include but are not limited to: sexual abstinence from intercourse with...
You likely can't join if
- Children under 5 years of age.
- Children and/or teenagers who are receiving long-term aspirin therapy.
- Persons who are pregnant or who are trying to become pregnant.
- Persons older than 65 years of age.
- Chronic pulmonary disease (e.g., asthma, emphysema, COPD).
- Chronic cardiovascular disease (e.g., cardiomyopathy, congestive heart failure, cardiac surgery, ischemic heart disease, known anatomic defects).
See the full eligibility criteria
Who can join
- Can understand and comply with all planned study procedures.
- Healthy, non-pregnant, non-breast-feeding persons aged ≥18 and ≤49 years of age inclusive at the time of challenge.
- Persons biologically able to become pregnant must be practicing abstinence or using an acceptable method of birth control for at least 30 days before the challenge through the duration of the trial.
- A person is considered of childbearing potential unless post-menopausal (absence of menses for ≥1 year) or surgically sterilized (tubal ligation/salpingectomy, bilateral oophorectomy, or hysterectomy).
- Acceptable contraception methods for persons of childbearing potential include but are not limited to: sexual abstinence from intercourse with partners biologically able to make them pregnant, monogamous relationship...
- Persons of childbearing potential must have a negative serum or urine pregnancy test at screening and a negative urine pregnancy test within 24 hours before challenge.
- Chronic pulmonary disease (e.g., asthma or emphysema).
- Chronic cardiovascular disease (e.g., cardiomyopathy, congestive heart failure, cardiac surgery, ischemic heart disease, known anatomic defects).
- Chronic medical conditions requiring close medical follow-up or hospitalization during the past 5 years (e.g., diabetes mellitus, renal dysfunction, hemoglobinopathies).
- Immunosuppression, ongoing malignancy, or history of malignancy (excluding non-melanotic skin cancer in remission without treatment for more than 5 years).
- Neurological and neurodevelopmental conditions (e.g., cerebral palsy, epilepsy, stroke, seizures).
- History of postinfectious or postvaccine neurological sequelae.
- Autoimmune, inflammatory, vasculitis, or rheumatic disease, including but not limited to systemic lupus erythematosus, polymyalgia rheumatica, rheumatoid arthritis, or scleroderma.
- Demonstrate knowledge and comprehension of the study by scoring ≥70% on a quiz on the study protocol and policies.
- Agrees to not use cigarettes, e-cigarettes, marijuana, or other tobacco products during the quarantine period.
- Agrees not to use prescription or over-the-counter medications that could impact influenza challenge how well it works or symptoms (including oseltamivir, zanamivir, peramivir, baloxavir marboxil, amantadine and...
What rules you out
- Children under 5 years of age.
- Children and/or teenagers who are receiving long-term aspirin therapy.
- Persons who are pregnant or who are trying to become pregnant.
- Persons older than 65 years of age.
- Chronic pulmonary disease (e.g., asthma, emphysema, COPD).
- Chronic cardiovascular disease (e.g., cardiomyopathy, congestive heart failure, cardiac surgery, ischemic heart disease, known anatomic defects).
- Contacts who required medical follow-up or hospitalization during the past 5 years because of chronic metabolic disease (e.g., diabetes mellitus, renal dysfunction, hemoglobinopathies).
- Immunosuppression or cancer.
- Neurological and neurodevelopmental conditions (e.g., cerebral palsy, epilepsy, stroke, seizures).
- Healthcare workers with patient contact during the two weeks following the influenza challenge.
- Plan to live in a confined environment (e.g., ship, camp, or dormitory) during the two weeks following the influenza challenge.
- Pregnant persons or are planning to become pregnant at any time during the study.
- Persons who are breastfeeding or plan to breastfeed at any time during the study.
- Have a body mass index (BMI) less than or equal to 18.5 or greater than or equal to 35.
- Smoke more than four cigarettes, e-cigarettes, marijuana, or other tobacco products weekly within 60 days before the challenge.
- Have moderate or severe illness within seven days before the challenge. This includes but is not limited to an oral temperature of ≥100°F, diarrhea, or vomiting.
- Have a pulse rate of less than 55 beats per minute (bpm) or greater than 100 bpm (participants will not be excluded if the heart rate is 55 bpm with moderate exercise (e.g., walking up two flights of stairs))
- Have a systolic blood pressure of less than 90 mmHg or greater than 140 mmHg on two separate measurements (screening and pre-challenge).
- Have a diastolic blood pressure of less than 50 mmHg or greater than 90 mmHg on two separate measurements (screening and pre-challenge).
- Have long-term (≥2 weeks) use of high-dose oral (≥20 mg per day prednisone or equivalent) or parenteral glucocorticoids, or high-dose inhaled steroids for greater than 7 days in the last 3 months.
- Have an active HIV, hepatitis B, or hepatitis C infection.
- Have screening laboratory test results (white blood cells [WBC], absolute neutrophil count [ANC], hemoglobin, platelets) that are outside the laboratory reported normal values and deemed clinically significant by the...
- Have a serum creatinine greater than 1.1 x upper limit of normal (ULN).
- Have an alanine aminotransferase (ALT) greater than 1.1 x ULN.
- Have abnormal findings on screening electrocardiogram deemed clinically significant by the study investigator.
- Have abnormal findings on screening chest X-ray deemed clinically significant by the study investigator.
- Have ongoing drug or alcohol abuse and/or dependence within five years of challenge.
- Have positive urine/serum test for drugs of abuse (i.e. cocaine, benzodiazepines, opiates, or metabolites). Positive results for tetrahydrocannabinol (THC) will not be considered exclusionary.
- Have any medical, psychiatric, occupational, or behavioral problems that could make it difficult for the participant to comply with the protocol as determined by the investigator.
- Have received experimental products within 30 days before the challenge or plan to receive experimental products at any time during the study.
- Plan to enroll in another clinical trial that could interfere with the safety assessment of the investigational product at any time during the study period, including study interventions such as drugs, biologics, or...
- Plan to donate blood during the study.
- Have received a live vaccine within 30 days before the challenge or plan to receive a live vaccine before Day 31 post-challenge.
- Have received an inactivated vaccine within 14 days before the challenge or plan to receive an inactivated vaccine before Day 14 of the challenge.
The study team makes the final eligibility decision.
Where it is enrolling
- Atlanta, Georgia, United States
Compensation & support
This study's listing mentions compensation or reimbursement.
No amount is published here because ClinicalTrials.gov has no reliable field for payment or travel support. Ask the study team what's actually covered (payment for your time, travel, parking, or other study costs), and never join a trial for the compensation alone.
Questions & answers
Do participants get paid in this trial?
This study's listing includes signals that participants may be compensated or receive a stipend. Amounts vary and are set by the study team, so confirm the details with them.
Is it free to join, and do I need insurance?
Searching and applying through BridgeMD is free. In clinical trials the study-related treatment and visits are generally provided at no cost to you. You usually don't need insurance to take part, but confirm specifics with the study team.
How long does this study last?
The study runs about 5 months per participant, based on its public description. The team confirms the exact schedule and number of visits before you enroll.
Who can join this trial?
This study is enrolling all sexes, 18 years to 49 years. Healthy volunteers may be eligible. The study team makes the final eligibility decision.
Where is this trial taking place?
This study is enrolling now at Atlanta, Georgia, United States. Enter your location above to see the nearest enrolling site and check your eligibility.
Explore other conditions
BridgeMD is an information and trial-matching tool that is independent of the study sponsor. Details come from ClinicalTrials.gov. The study team decides eligibility, and your own doctor gives medical advice.