# Study to Find the Percentage of Cases Retaining COVID-19 IgG Antibodies 45-65 After They Have Tested Positive

> **NCT04605952** · — · COMPLETED · sponsor: **Tata Main Hospital** · enrollment: 201 (actual)

## Conditions studied

- Covid19

## Interventions

- **DIAGNOSTIC_TEST:** Repeat SARS-CoV-2 IgG antibodies at 45-65 days

## Key facts

- **NCT ID:** NCT04605952
- **Lead sponsor:** Tata Main Hospital
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2020-07-01
- **Primary completion:** 2020-08-30
- **Final completion:** 2020-08-30
- **Target enrollment:** 201 (ACTUAL)
- **Last updated:** 2020-10-28


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04605952

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04605952, "Study to Find the Percentage of Cases Retaining COVID-19 IgG Antibodies 45-65 After They Have Tested Positive". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT04605952. Licensed CC0.

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