Safe Administration of Flu Vaccine to Egg Allergic Children (SAFE)
|First Submitted Date ICMJE||December 21, 2010|
|First Posted Date ICMJE||December 22, 2010|
|Results First Submitted Date||July 31, 2017|
|Results First Posted Date||October 26, 2017|
|Last Update Posted Date||October 26, 2017|
|Start Date ICMJE||October 2010|
|Primary Completion Date||May 2012 (Final data collection date for primary outcome measure)|
|Current Primary Outcome Measures ICMJE
||Categorical Reactivity to Vaccine as it Was Administered [ Time Frame: 48 hours ]
After randomization, group 1 will receive a 10%/90% (or 20%/80% for 0.25ml) graded challenge of the age appropriate TIV dose, separated by 30 minutes for observation. Group 2 will receive a first dose consisting of normal saline at a volume equal to 10% of their age appropriate dose, and the second dose will consist of their full age appropriate dose as the "90%" equivalent, also separated by 30 minutes of observation. For children receiving a 0.25ml dose, a 20%/80% split will be used for ease of administration in drawing up the dose. All parties will report any adverse reactions occurring in the next 48 hours after vaccination that were not observed at the time of in office observation.
|Original Primary Outcome Measures ICMJE
||Demonstate that egg allergic individuals with a history of anaphylaxis or severe reaction to egg can safely receive a single dose of TIV (Trivalent Influenza Vaccine) [ Time Frame: 6 months ]
Subjects will be randomized at the time of enrollment to receive their vaccine as a 2-step process. 1 group will receive a 10%/90% graded challenge of the age appropriate TIV dose, separated by 30 minutes for observation. The second group will receive 2 doses as well, but the first dose will consist of normal saline at a volume equal to 10% of their age appropriate dose, and the second dose will consist of their full age appropriate dose as the "90%" equivalent. All doses will be separated by 30 minutes of observation for symptom development by an individual blinded to the study arm.
|Change History||Complete list of historical versions of study NCT01264601 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE
||Influence of Atopic Co-morbidities on Severe Reactivity to Vaccine as it Was Administered [ Time Frame: 6 months ]
Rates of co-morbid allergic disease, size and magnitude of egg skin and ImmunoCAP tests, presence of other food allergy, and tolerance of "baked egg" will be assessed through a screening questionnaire and chart review, and compared between the groups to assess for any significant differences that may predict TIV tolerance.
|Original Secondary Outcome Measures ICMJE
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Safe Administration of Flu Vaccine to Egg Allergic Children|
|Official Title ICMJE||Multi-Centered, Randomized, Placebo-Controlled Trial of the Safety of Influenza Vaccine in Egg Allergic Children With a History of Anaphylaxis or Severe Allergy to Egg|
Historically, providing influenza vaccination of egg allergic children and young adults (EAC) with a history of anaphylaxis to egg, or other severe symptoms of an allergic reaction to egg (e.g., severe hives, swelling, or asthma), has been contra-indicated, though vaccination of children with less severe egg allergy has been shown to be safe. Though many children with severe egg allergy, including anaphylaxis, have received past influenza vaccination anecdotally, very few data exist to show this procedure is safe. The investigators propose a double blind, placebo-controlled randomized, prospective multi-centered study to a) demonstrate seasonal trivalent influenza vaccine (TIV) can be safely given in a single dose (as opposed to through 2-step graded dosing of 10% then 90% of the vaccine dose) to EAC despite history of anaphylaxis or previous severe allergic reaction to egg; and b) provide further evidence that adverse outcomes are not related to ovalbumin (egg) content in TIV.
Study participants must have a documented history of a severe egg allergy, substantiated by both a history of clinical reactivity AND either a positive skin test or ImmunoCAP/RAST test greater than 0.7 kUA/L. Participants will be randomized to receive either a 2-step graded challenge or a single dose given after a small placebo dose of saline (to mimic the graded challenge). If required, all participants will receive a booster vaccination as a single dose.
Seasonal Trivalent Influenza Vaccine (TIV) is grown in embryonated chicken eggs, and since it contains residual egg protein (ovalbumin), providing TIV to egg allergic children (EAC) could potentially provoke allergic reactivity. Because of this possibility, historically caution has been advised in providing TIV to these children, and the vaccine has been withheld in certain individuals, though for many it has been safely administered after vaccine skin testing and stepwise administration. In the 2009 American Academy of Pediatrics Red Book (and previous editions), a history of severe allergic reactivity to egg is a contraindication to receiving TIV, though it is acknowledged that less severely egg allergic kids have safely received TIV if precautions had been taken.
In the past year, several studies have emerged that demonstrate that most, if not all, EAC can safely be vaccinated with both TIV ad the H1N1 vaccine. A recent 5 year review of TIV administration in EAC ages 6 mo-36 mo, showed safe administration to 135 EAC after TIV skin testing, including 14 subjects with a history of anaphylaxis to egg. Another large, retrospective study of non-anaphylactic EAC showed TIV could be successfully administered using a 2-step protocol without skin testing to TIV. In a single center H1N1 vaccine study last fall, 105 EAC received either a full vaccine dose if skin tests were negative, or a 2-step graded challenge if the tests were positive, including 25 subjects with a history of anaphylaxis. No allergic reactions resulted, regardless of the results of skin testing, the method of administration, ovalbumin content of the vaccine, or use of a different booster lot without pre-testing. In a sister-study, 68 H1N1 participants prospectively received TIV safely without graded challenge, including 13 EAC with a history of egg anaphylaxis. A large prospective, Canadian multi-centered study, using an adjuvanted H1N1 preparation containing 0.03μg/mL of ovalbumin, was safely given to 72 individuals with either a history of severe cardiopulmonary reactivity to egg or a history of poorly controlled asthma (this group was not further broken down), via 2-step graded challenge. Thus, these studies suggest it is safe for EAC with a history of anaphylaxis to receive TIV and H1N1 without pre-testing, suggest that use of a 2-step graded challenge may be unnecessary, and show some evidence that past egg allergy severity may not be an important factor in vaccine tolerance. Recent guidelines published by the AAAAI suggest a flexible approach is reasonable, and that EAC can receive TIV without prior skin testing through either a single dose or a 2-step approach.
This double blind, randomized, placebo-controlled, multi-centered study aims to investigate the safety of TIV given to EAC with a history of a severe past reaction or anaphylaxis to egg, and aims to show that a single dose route of administration is safe and sufficient. Participants with new or established severe egg allergy (see eligibility criteria) will be randomized to receive either a 2-step (10%, followed by 30 min. observation, then residual 90%) graded challenge or a single dose of TIV given 30 minutes after a placebo dose of normal saline is administered (to approximate the graded challenge). Vaccine tolerance will be analyzed and compared to ovalbumin content of the vaccine lots, as well as to baseline characteristics of the participant's egg allergy and allergic history.
Secondary outcomes originally posted on the www.clinicaltrials.gov website were hypotheses which were aims of complex data analysis but were not in and of themselves actual outcome measures. Therefore these have been deleted from the record
|Study Type ICMJE||Interventional|
|Study Phase||Not Provided|
|Study Design ICMJE||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
|Condition ICMJE||Egg Allergy|
|Intervention ICMJE||Biological: Trivalent Influenza Vaccine
Age appropriate dose of seasonal Trivalent Influenza Vaccine (TIV), either 0.25mL under age 3 or 0.5mL over the age of 3.
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Completion Date||August 2012|
|Primary Completion Date||May 2012 (Final data collection date for primary outcome measure)|
|Eligibility Criteria ICMJE||
|Ages||6 Months to 24 Years (Child, Adult)|
|Accepts Healthy Volunteers||No|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries ICMJE||United States|
|Removed Location Countries|
|NCT Number ICMJE||NCT01264601|
|Other Study ID Numbers ICMJE||HUM 00038826|
|Has Data Monitoring Committee||Yes|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement||Not Provided|
|Responsible Party||Matthew Greenhawt, University of Michigan|
|Study Sponsor ICMJE||University of Michigan|
|Collaborators ICMJE||American College of Allergy, Asthma and Immunology|
|PRS Account||University of Michigan|
|Verification Date||September 2017|
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