# Sequential Versus Simultaneous Pneumococcal Vaccination in Elderly: Immunological Memory and Antibody Levels

> **NCT02637583** · PHASE4 · COMPLETED · sponsor: **Jena University Hospital** · enrollment: 123 (actual)

## Conditions studied

- Pneumococcal Infections

## Interventions

- **DRUG:** PCV13
- **DRUG:** PPV23

## Key facts

- **NCT ID:** NCT02637583
- **Lead sponsor:** Jena University Hospital
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2017-10-18
- **Primary completion:** 2022-11-07
- **Final completion:** 2023-11-06
- **Target enrollment:** 123 (ACTUAL)
- **Last updated:** 2023-12-01


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT02637583

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT02637583, "Sequential Versus Simultaneous Pneumococcal Vaccination in Elderly: Immunological Memory and Antibody Levels". Retrieved via AI Analytics 2026-05-25 from https://api.ai-analytics.org/clinical/NCT02637583. Licensed CC0.

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