# Epidemiological Study on Asymptomatic Infections and Mild Illness With Covid-19 in Shanghai

> **NCT05375786** · — · UNKNOWN · sponsor: **Ruijin Hospital** · enrollment: 10000 (estimated)

## Conditions studied

- COVID-19

## Interventions

- **BIOLOGICAL:** Vaccination completion status

## Key facts

- **NCT ID:** NCT05375786
- **Lead sponsor:** Ruijin Hospital
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** UNKNOWN
- **Start date:** 2022-04-02
- **Primary completion:** 2022-06-30
- **Final completion:** 2022-07-31
- **Target enrollment:** 10000 (ESTIMATED)
- **Last updated:** 2022-05-17


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05375786

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05375786, "Epidemiological Study on Asymptomatic Infections and Mild Illness With Covid-19 in Shanghai". Retrieved via AI Analytics 2026-06-01 from https://api.ai-analytics.org/clinical/NCT05375786. Licensed CC0.

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