# Responses to COVID-19 Vaccination in Patients With Cancer

> **NCT04745377** · — · COMPLETED · sponsor: **Hellenic Cooperative Oncology Group** · enrollment: 332 (actual)

## Conditions studied

- Cancer

## Interventions

- **DIAGNOSTIC_TEST:** IgG neutralising antibody titers to S1 and S2 proteins of SARS-COV-2 virus

## Key facts

- **NCT ID:** NCT04745377
- **Lead sponsor:** Hellenic Cooperative Oncology Group
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2021-01-12
- **Primary completion:** 2021-10-14
- **Final completion:** 2022-05-20
- **Target enrollment:** 332 (ACTUAL)
- **Last updated:** 2022-08-17


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04745377

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04745377, "Responses to COVID-19 Vaccination in Patients With Cancer". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT04745377. Licensed CC0.

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