Vaccine · Connecticut
Vaccine studies in Connecticut
5 studies have at least one recruiting site in Connecticut. Vaccine trials test how well new or updated vaccines produce an immune response and how they are tolerated. Many recruit healthy adults; some focus on older adults, children or people with specific conditions.
5 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
Studies
- RecruitingHealthy volunteersEarly Phase 1
Intradermal Influenza Vaccination
Yale University
- Location
- New Haven, CT
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteersPhase 3
A Study to Assess the Safety, Tolerability, and Immunogenicity of 3 Lots of a Multivalent Pneumococcal Conjugate Vaccine Administered to Adults
Pfizer
- Location
- Milford, CT + 36 other US sites
- Eligibility basics
- Ages 18–49
- RecruitingHealthy volunteersPhase 3
A Study on the Efficacy of a Vaccine Against Influenza in Adults ≥65 Years of Age
GlaxoSmithKline
- Location
- Stamford, CT + 130 other US sites
- Eligibility basics
- Ages 65+
- RecruitingHealthy volunteersPhase 2
A Study to Learn About mRNA Vaccines Against Influenza in Adults
Pfizer
- Location
- Milford, CT + 14 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 2
Systems Investigation of Vaccine Responses in Aging and Frailty
Yale University
- Location
- New Haven, CT
- Eligibility basics
- Ages 21+
Who these studies look for
Vaccine studies often exclude people who recently received a related vaccine or had the infection, and those with conditions or medicines that affect the immune system.
Matching a page like this one never means you qualify. Each research team decides eligibility at screening.
Questions
Could I receive a placebo?
Often yes. Many vaccine trials are randomized, so some participants receive a comparison vaccine or placebo. The consent document explains this.