Understanding Immunity to the COVID-19 Vaccines

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT04664309

Enrollment

Registered

2020-12-11

Start date

2021-03-26

Completion date

2022-01-06

Last updated

2022-02-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

COVID-19, Immunity, Vaccine

Brief summary

The purpose of this study is to test over time immunity to the COVID-19 vaccines. Adults who are receiving COVID-19 vaccines will be invited to participate.

Interventions

OTHERNo intervention

No intervention

Study design

Observational model

CASE_ONLY

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Yes

Inclusion criteria

* Adults who are receiving a COVID-19 vaccine

Exclusion criteria

* Patients with special risks attendant to venipuncture

Design outcomes

Primary

Measure	Time frame
Percentage of participants with immunity to COVID-19 vaccines over time	1 year

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026