COVID-19 Household Transmission Study
Public ClinicalTrials.gov record NCT04445233. 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.
Official title
The COVID-19 Household Transmission Study (CO-HOST) - Epidemiology of SARS-CoV-2 Transmission Within the Household
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This study will test and follow persons quarantined at home after testing positive for SARS-CoV-2 (COV) aged 18 years and older and their household members aged 1 year and older. The purpose of this research study is to understand how often COVID-19 (Coronavirus Disease 2019) spreads in the household when someone who tests positive for the virus self-isolates at home. The purpose of the extension part of the study is to help us understand long-term immunity to COVID-19. We are interested in how our immune system might still protect us from COVID-19 even after antibody levels decrease or are no longer detected. We are also interested in how immunity to COVID-19 is different in kids vs. adults.
Study identification
- NCT ID
- NCT04445233
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 315 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 1 Year and older
- 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
- Apr 28, 2020
- Primary completion
- Aug 31, 2021
- Completion
- Aug 31, 2021
- Last update posted
- Apr 26, 2022
2020 – 2021
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of North Carolina Health Care | Chapel Hill | North Carolina | 27514 | — |
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 NCT04445233, 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 Apr 26, 2022 · Synced Sep 9, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04445233 live on ClinicalTrials.gov.