NCT06172660 · Yale University
Real-World Effectiveness of Perinatal RSV Immunoprophylaxis
What this study is about
The purpose of this study is to continue evaluating how well the RSV vaccines work as they are currently being used in routine clinical practice.
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The purpose of this study is to continue evaluating how well the RSV vaccines work as they are currently being used in routine clinical practice.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- ≤ 12 months of age at the time of presentation for evaluation for an acute respiratory infection (ARI).
- Documentation of an ARI, which is defined as an acute onset (\<10 days) illness that includes: At least two of the following symptoms: fever (measured or subjective), chills, rigors, myalgia, headache, sore throat, nausea or vomiting, diarrhea, fatigue, congestion OR any one of the following: cough, shortness of breath, difficulty breathing, olfactory disorder, taste disorder, confusion, persistent chest pain, pale, gray, hypoxia, clinical or radiographic evidence of pneumonia or respiratory distress syndrome.
- Residents of Connecticut
Exclusion criteria
- Illness duration of \>10 days at the time of respiratory specimen collection, measured from the date of the first symptom of the current acute illness.
- Parents/guardians are not able to provide informed consent To be eligible for inclusion in the study as a healthy control, an individual must meet all of the following criteria:
- Immunized against RSV ≤ 12 months of age
- Residents of Connecticut
- Match an enrolled case that was a vaccine failure by date of birth (±1 month), sex, and immunoprophylactic agent received (i.e., maternal vaccine vs mAb).
Where
- New Haven, Connecticut
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Aug 14, 2025 · Source of record for eligibility and locations