SARS-CoV-2 Immune Responses After COVID-19 Therapy and Subsequent Vaccine
试验速览
- 阶段
- 4 期
- 状态
- 已完成
- 入组人数
- 43
- 试验地点
- 12
- 主要终点
- Neutralizing Antibody (NAb) Level
研究概览
简要总结
The purpose of this study is to evaluate the safety and efficacy of mRNA COVID-19 vaccines in:
• People with prior COVID-19 (SARS-CoV-2 infection) who were in the ACTIV-2/A5401 study.
And
• People who have never had COVID-19 (SARS-CoV-2 infection).
详细描述
A5404 is a phase IV, open-label study. The objective of A5404 is to evaluate how prior investigational therapy for COVID-19 versus comparator (placebo or active comparator) affects vaccine response. The safety of mRNA COVID-19 vaccines is also explored.
Eligible A5404 participants include: Participants of ACTIV-2/A5401 at selected sites who received an investigational therapy or its comparator; and persons without known history of prior SARS-CoV-2 infection defined as no known history of any SARS-CoV-2 positive test (non-A5401 participants). In line with our protocol, for outcome measures related to neutralizing antibodies and adverse events, we further break down the ACTIV-2/A5401 participants into two exposure groups: those who received an active therapy (AZD7442 IM or IV, BRII-196 + BRII 198 IV, SAB 185 (3,840 or 10,240 units/kg) IV, BMS 096414+BMS 986413 subcutaneous) and those who received Camostat Oral or Placebo.
Participants of ACTIV-2/A5401 received study-provided standard dosing of the Moderna mRNA-1273 vaccine, or a community-provided mRNA-based COVID-19 vaccine (e.g., Moderna or Pfizer). Participants in ACTIV-2/A5401 received their mRNA-based COVID-19 vaccine 60-240 days after receiving their last dose of a select ACTIV-2/A5401 investigational therapy, or its comparator. Participants without prior COVID-19 received study-provided standard dosing of the Moderna mRNA-1273 vaccine.
The study closed early to accrual on February 25, 2022 due to slow enrollment. Clarification Memo #1 (dated January 11, 2023) reflects decisions to discontinue follow up at study Day 365 instead of following participants to Day 730 after the first dose of vaccine and to reallocate some secondary outcome measures to exploratory outcome measures.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Single Group
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •For all participants: Ability and willingness of participant (or legally authorized representative) to provide informed consent prior to initiation of any study procedures.
- •For participants who are in, or who have completed, the ACTIV-2/A5401 trial: Receipt of all selected investigational therapy or active comparator/placebo for that therapy at selected sites.
- •For participants who are in, or who have completed, the ACTIV-2/A5401 trial and receive study-provided Moderna mRNA-1273 COVID-19 vaccine: Receipt of the last dose of investigational therapy or active comparator/placebo for that therapy ≥30 days and ≤240 days prior to study entry.
- •For participants who are in, or who have completed, the ACTIV-2/A5401 trial and have received or will be receiving community-provided mRNA-based COVID-19 vaccine: Receipt of the last dose of investigational therapy or active comparator/placebo for that therapy ≥30 and ≤240 days prior to receipt or planned receipt of the first dose of community-provided vaccine.
排除标准
- •For participants who are in, or who have completed, the ACTIV-2/A5401 trial: Self-report of prior receipt of a non-mRNA-based COVID-19 vaccine.
- •For participants who are in, or who have completed, the ACTIV-2/A5401 trial: Self-report of receipt of the first dose of an mRNA-based COVID-19 vaccine 140 days or more before A5404 enrollment.
- •For participants who are in, or who have completed, the ACTIV-2/A5401 trial: Self-report of a second SARS-CoV-2 infection after the infection that qualified the participant for ACTIV-2/A
- •For non-A5401/ACTIV-2 participants: Self-report of receipt of any prior COVID-19 vaccine.
- •For non-A5401/ACTIV-2 participants: Known prior history of any SARS-CoV-2-positive test (e.g., PCR test, Nucleic Acid Amplification Test (NAAT), antigen test, serology test).
- •For participants who receive study-provided Moderna mRNA-1273 COVID-19 vaccine: Known allergy to any component of the Moderna COVID-19 vaccine.
结局指标
主要结局
Neutralizing Antibody (NAb) Level
时间窗: Measured 140 days after the first dose of the vaccine
NAb level was measured by using both 50% neutralizing dilution titers (ND50) and 80% neutralizing titers (ND80). A higher NAb level corresponds to a stronger immune response. For ND50 values less than lower limit of quantification (LLQ), we impute with 10 (which is ½ LLQ of 20). For ND50 values exceeding the upper limit of quantification (ULQ), we impute with 20,000 (a value suggested by the immunology lab, which is 2 times the ULQ of 10,000). For ND80, we impute similarly with 10 and 20,000. We carry forward the Day 56 NAb measurement if the Day 140 measurement is not reported.
次要结局
- Number of Participants With Grade 1 or Higher Allergic Reaction(From first dose of the vaccine through 56 days after the first dose of the vaccine)
- Geometric Mean of Relative Change in Neutralizing Antibody Levels From Pre-vaccine to Post-vaccine by Received Vaccine(Measured before the first dose of the vaccine, and 56 days after the first dose of the vaccine)
- Proportion of Participants With New Grade 3 or Higher AE, or SAE, or AE Leading to Change or Discontinuation in Vaccine Receipt(From first dose of the vaccine through 140 days after the first dose of the vaccine)
- Proportion of Participants With Grade 2 or Higher Injection Site Reaction(From first dose of the vaccine through 56 days after the first dose of the vaccine)
- Geometric Mean of Relative Change in Neutralizing Antibody Levels From Pre-vaccine to Post-vaccine(Measured before the first dose of the vaccine, and 56 days after the first dose of the vaccine)