SJTRC-St. Jude Tracking of Viral and Host Factors Associated With COVID-19: A Prospective Adaptive Cohort Study
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 1,316
- 试验地点
- 1
- 主要终点
- Positive CD4 and CD8 cell epitope positive response
研究概览
简要总结
This is a prospective adaptive cohort study of St. Jude employees to determine the rate of SARS-CoV-2 infections that are asymptomatic and to evaluate immunological responses to SARS-CoV-2 infection.
Primary Objectives
- To estimate the proportion of asymptomatic infection with SARS-CoV-2 infection in a population of SARS-CoV-2-naïve adult St. Jude employees
- To comprehensively map CD4 and CD8 T cell epitopes and response magnitudes to SARS-CoV-2 infection in a population of SARS-CoV-2-naïve adult St. Jude employees who acquire SARS-CoV-2 infection
- To measure changes in the CD4 and CD8 response magnitude and function to SARS-CoV-2 infection and/or vaccination in a population of St. Jude employees for up to 48 months after infection and/or vaccination.
Secondary Objectives
- To establish seroprevalence of SARS-CoV-2-specific antibodies at baseline, and identify the rate of seroconversion to SARS-CoV-2 in a population of presumably naïve adult St. Jude employees
- To identify features of T cell responses at baseline and during SARS-CoV-2 infection that are associated with protection against symptomatic or severe COVID-19 disease in a population of adult St. Jude employees
- To identify risk factors for long-term protection against COVID-19 in a population of adult St. Jude employees
- To evaluate changes in antibody responses to SARS-CoV-2 in a population of St. Jude employees for up to 48 months after SARS-CoV-2 infection and/or vaccination.
- To evaluate the saliva antibody and cytokine response to SARS-CoV-2 infection and/or vaccination and identify characteristics that predict protection from subsequent SARS-CoV-2 infection among a population of St. Jude employees followed for up to 48 months after SARS-CoV-2 infection and/or vaccination.
- To measure changes in saliva antibody responses to SARS-CoV-2 for up to 48 months after SARS-CoV-2 infection and/or vaccination.
Exploratory Objectives
- To establish additional immunological features including host immune or receptor polymorphisms associated with response to SARS-CoV-2 infection
- To explore SARS-CoV-2 diversity and specific features in a circumscribed population
- To describe the presence, characteristics, and proportion of short-term re-infection
- To determine if an association between SARS-CoV-2 viral load in nasal swab specimens and COVID-19 symptoms can be identified in a population of adult St. Jude employees who acquire SARS-CoV-2
- To explore the laboratory and clinical response to SARS-CoV-2 vaccine in a population of adult St. Jude employees with and without a history of SARS-CoV-2 infection
详细描述
Naive individuals will contribute a baseline blood sample at enrollment. Subsequent routine blood draws will occur to determine the proportion of participants who have asymptomatically seroconverted; the timing of these blood draws and proportion of participants required will be determined by the rate of documented SARS-CoV-2 infection in the cohort according to an adaptive study design. Participants will be tracked for SARS-CoV-2 specific antibodies and CD4, and CD8 T cell responses throughout the period and especially during the early stages after clearance of infection and subsequently to determine the quality and duration of memory responses.
In addition to blood samples, participants will intermittently provide nasal swabs for detection of SARS-CoV-2; this will occur either through a comprehensive proactive employee screening program, or specifically for the purposes of the research study if participants are required to attend campus but are not currently eligible for employee screening. These will determine duration and characteristics of viral shedding and identify reinfection. Seroprevalence estimates and asymptomatic conversion will also be determined.
Individuals with a diagnosis of COVID-19 infection will have two additional blood draws in the acute and convalescent phase to identify acute and late immune responses. These responses will be compared to the essential baseline sample data to characterize the generation of de novo and cross-reactive recall responses.
For those participants receiving vaccination, blood draws will be taken after COVID vaccine (3-8 weeks after completion of 1 or 2 dose course) and at completion of study.
At enrollment, subjects will complete a baseline online personal health and demographic questionnaire, and then monthly brief online health update questionnaires. Throughout the study period, subjects will complete a brief online symptom survey every 2 weeks.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Adult St. Jude employees (Age ≥ 18 years of age) who are presumed to be SARS- CoV-2 naive, or have a recent diagnosis of COVID-19, and volunteer to participate.
- •Willing to undergo blood draws on up to 5 occasions during the study.
- •Receiving approximately twice-weekly SARS-CoV-2 screening by Occupational Health, or willing to provide up to twice weekly nasal self-swabs if attending campus.
- •Have access to a personal smartphone that is able to receive and respond to text messages for data collection.
- •Has ready access to the internet to log personal study information into the REDCap database.
- •Self-identified as able to speak and read English well enough to understand the consent process and survey forms, and to report symptoms.
- •Inclusion Criteria for LTFU arm:
- •Adult St. Jude employees (age ≥ 18 years of age) who participated in the original SJTRC study.
- •Willing to undergo blood draws on up to five occasions during the LTFU arm. Willing to provide saliva samples at acute and convalescent episodes.
- •Have access to a personal smartphone that is able to receive and respond to text messages for data collection.
- •Have ready access to the internet to log personal study information into the REDCap database.
- •Self-identified as able to speak and read English well enough to understand the consent process and questionnaires, and to report symptoms.
排除标准
- •Employees who are first-degree relatives of, or directly or indirectly report up to, the PI or any of the clinical study investigators who will have access to participant identities.
- •Employees who cannot complete the informed consent process.
- •Exclusion Criteria for LTFU arm:
- •Employees who did not participate in the original SJTRC study.
- •Employees who cannot complete the informed consent process.
结局指标
主要结局
Positive CD4 and CD8 cell epitope positive response
时间窗: up to 48 months of additional observation in participants who have had COVID-19 or vaccination
A list of CD4 and CD8 cell epitopes with a magnitude change from baseline that is at least twice the standard deviation of the baseline.
Proportion of asymptomatic subjects
时间窗: 1 year from enrollment
The proportion of participants who test positive for SARS-CoV-2 infection but remain asymptomatic.
次要结局
- Proportion of seroprevalence(Baseline, 3 months, 6 months, 9 months and 1 year)
- Change in antibody responses to SARS-CoV-2(up to 48 months of additional observation in participants who have had COVID-19 or vaccination)
- Protective antibody responses against SARS-CoV-2 at last follow-up sample(up to 48 months of additional observation in participants who have had COVID-19 or vaccination)
- T-cell response(Baseline, 3 months, 6 months, 9months, 1 year and 6 monthly for an additional 48 months in participants included in the long-term follow-up arm)
- Saliva antibody and cytokine responses to SARS-CoV-2(up to 48 months of additional observation in participants who have had COVID-19 or vaccination)