Vaccine · Sioux City, IA
Vaccine studies in Sioux City, IA
3 recruiting studies have a site in Sioux City.
3 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
Studies
- RecruitingHealthy volunteersPhase 4
Study of a Recombinant Spike COVID-19 Vaccine With Matrix-M in Older Adults and People at Increased Risk of Severe COVID-19
Sanofi
- Location
- Sioux City, IA + 19 other US sites
- Eligibility basics
- Ages 12+
- 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
- Sioux City, IA + 36 other US sites
- Eligibility basics
- Ages 18–49
- RecruitingHealthy volunteersPhase 3
A Study to Learn About a Clostridioides Difficile Vaccine in People 65 Years of Age and Older
Pfizer
- Location
- Sioux City, IA + 138 other US sites
- Eligibility basics
- Ages 65+
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.