Serological Surveillance for COVID-19 in Central North Carolina
Public ClinicalTrials.gov record NCT04490174. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Background: The SARS-CoV-2 virus has caused a pandemic. Little is known about the virus, so data is needed to form an effective public health response. Researchers want to count how many people have been exposed to COVID-19, learn about symptoms, and find out how many antibodies to the SARS-CoV-2 virus a person may have in their blood over 1 year. This data could affect the response to current and future pandemics. Objective: To learn how many people from a sampling of adults in North Carolina develop antibodies to the SARS-CoV-2 virus over 1 year. Eligibility: Healthy people age 18 and older who do not currently have COVID-19 Design: Participants will be screened with questions about their health. Participants will have five 30-minute visits at the Clinical Research Unit. At each visit, they will have blood drawn to see if they have SARS-CoV-2 antibodies. If the test result is positive for antibodies, the participant will be tested to see if they currently have COVID-19. For this, a nasal or throat swab will be done, or saliva will be collected. They may do this test at the same visit as the blood draw, or they may schedule an extra visit. Around the time of their study visits, participants will take an online survey about themselves, their health, and COVID-19. It takes 10 minutes to complete. Every week for 52 weeks, they will also take a brief online survey about their symptoms. It takes 2 minutes to complete. They will be emailed a link to log in and fill out the surveys on a secure website. Participation will last for 1 year.
Study identification
- NCT ID
- NCT04490174
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 643 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- 18 Years to 100 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 23, 2020
- Primary completion
- Dec 4, 2023
- Completion
- Dec 4, 2023
- Last update posted
- Feb 1, 2026
2020 – 2023
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| NIEHS Clinical Research Unit (CRU) | Research Triangle Park | North Carolina | 27709 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04490174, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Feb 1, 2026 · Synced Sep 2, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04490174 live on ClinicalTrials.gov.