A Randomized, Placebo-controlled Crossover Study to Assess the Safety of Administering a Second Dose of a COVID-19 mRNA Vaccine in Individuals Who Experienced a Systemic Allergic Reaction to an Initial Dose
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 入组人数
- 20
- 试验地点
- 2
- 主要终点
- Proportion of Participants Who Had Recurrent Systemic Allergic Reaction to Vaccine
研究概览
简要总结
Background:
Some people have allergic reactions to COVID-19 mRNA vaccines. Researchers want to learn more about these reactions to provide guidance on who can safely receive the vaccines, including a second dose in people who had a reaction to the first.
Objective:
To study the safety of giving a second mRNA COVID-19 vaccine dose to people who had a systemic allergic reaction to their first dose.
Eligibility:
People aged 16-69 who had a systemic allergic reaction to their first dose of COVID-19 vaccine.
Design:
Individuals who have underlying health issues may need to come to the NIH for screening tests to make sure they are safe to receive the vaccine. People who are eligible to participate in the study will be admitted to the NIH hospital and stay for at least 4 days. They will give urine samples. They will have a nasal swab SARS-CoV-2 test. They will have an intravenous line placed in each arm. They will get the study vaccine (Pfizer-BioNTech COVID-19 vaccine) and one dose of placebo on different days. They will have breathing tests. They may have clinical photography if they develop a rash.
Participants will have 4 follow-up visits - 2 by phone and 2 in-person visits at the NIH campus . They will have allergy skin testing at one visit. Drops of different allergens or controls will be placed on their back or arm. The skin under each drop will be scratched with a tool. If the results are negative, a small amount of allergen will be injected just below the surface of their skin. Participants who have no or only a mild allergic reaction to the second dose of the vaccine may be eligible to receive a Booster dose at the NIH.
Participation will last for approximately 5 months.
详细描述
Study Description:
This is a single-site study to determine the safety of administering a dose of the Pfizer-BioNTech mRNA coronavirus disease 2019 (COVID-19) vaccine (Comirnaty) to individuals who experienced a systemic allergic reaction to their first full dose of the same vaccine or the Moderna mRNA vaccine, and to investigate possible mechanisms underlying allergic reactions.
Objectives:
Primary Objective:
- Assess the proportion of participants who develop a systemic allergic reaction (Consortium for Food Allergy Research grade 2 reaction and above regardless of tryptase, or CoFAR grade 1 with elevated tryptase [1.2 X baseline plus 2ng/mL]) to the Pfizer-BioNTech COVID-19 vaccine after previously demonstrating a systemic allergic reaction (CoFAR Grade 2 or 3 reaction regardless of tryptase OR Grade 1 reaction with elevated tryptase [1.2 X baseline plus 2ng/mL]) to their first full dose of the same vaccine or the Moderna COVID-19 vaccine.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Basic Science
- 盲法
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 16 Years 至 69 Years（Child, Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- 未提供
排除标准
- 未提供
结局指标
主要结局
Proportion of Participants Who Had Recurrent Systemic Allergic Reaction to Vaccine
时间窗: Within the 3-hour post-vaccine observation period
Proportion of participants who had recurrent systemic allergic reaction following active COVID-19 vaccine dose in this study. Allergic reactions were graded using Consortium of Food Allergy Research (CoFAR) grading scale (Version 3.0) where Grade 1 (mild) = mild symptoms involving one organ system (skin, conjunctiva, upper respiratory or gastrointestinal); Grade 2 (moderate) = mild symptoms involving ≥2 organ system (skin, conjunctiva, upper respiratory or gastrointestinal); Grade 3 (severe)= moderate to severe cardiovascular, lower respiratory or gastrointestinal symptoms, responsive to treatment and/or without end-organ dysfunction; Grade 4 = severe cardiovascular or lower respiratory symptoms, with end-organ dysfunction and/or refractory to treatment; and Grade 5 = death. Systemic allergic reaction was defined as CoFAR grade 1 reaction with elevated tryptase or CoFAR Grade ≥ 2 reaction irrespective of tryptase levels.
次要结局
- Proportion of Participants Who Developed Anaphylactic Reaction Following Active Vaccine Dose(Within the 3-hour post-vaccine observation period)
- Proportion of Participants Who Had Recurrent Systemic Allergic Reaction Following Active Vaccine Dose Compared With Rate of Reaction in Placebo(Within the 3-hour post-vaccine observation period)
- Proportion of Participants Who Developed Anaphylactic Reaction Following Active Dose Delivered(Within the 3-hour post-vaccine observation period)
- Proportion of Participants Who Developed Severe Systemic Allergic Reaction to Vaccine(Within the 3-hour post-vaccine observation period)
- Proportion of Participants With Less Severe Allergic Reaction to the Vaccine Dose Delivered in This Study Than Recorded Reaction to the First Full COVID-19 Vaccine Dose(Within the 3-hour post-vaccine observation period)
- Proportion of Participants With More Severe Systemic Allergic Reaction to the Vaccine Dose Delivered in This Study Than Recorded Reaction to the First Full Vaccine Dose(Within the 3-hour post-vaccine observation period)
- Proportion of Participants Who Developed Mild or Moderate Systemic Allergic Reaction Following Active Vaccine Dose(Within the 3-hour post-vaccine observation period)