# Direct and Indirect Benefits of Influenza Vaccination in Schools and Households

> **NCT00981513** · PHASE4 · COMPLETED · sponsor: **The University of Hong Kong** · enrollment: 6300 (estimated)

## Conditions studied

- Influenza Virus Infection
- Influenza-like Illness
- Acute Respiratory Infection

## Interventions

- **BIOLOGICAL:** Trivalent live attenuated seasonal influenza vaccine
- **BIOLOGICAL:** Monovalent live attenuated pandemic influenza vaccine
- **BIOLOGICAL:** Saline

## Key facts

- **NCT ID:** NCT00981513
- **Lead sponsor:** The University of Hong Kong
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2009-09
- **Primary completion:** 2010-11
- **Final completion:** 2010-11
- **Target enrollment:** 6300 (ESTIMATED)
- **Last updated:** 2011-08-19


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00981513

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00981513, "Direct and Indirect Benefits of Influenza Vaccination in Schools and Households". Retrieved via AI Analytics 2026-07-26 from https://api.ai-analytics.org/clinical/NCT00981513. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*