Clinical Trial Assessing the Immunologic Response to a Influenza Vaccine Delivered Using an Jet Injection Device or a Needle Syringe

Phase 4

Completed

Brief Summary: The primary objective of this study was to evaluate if administration of a seasonal flu vaccine using a jet injector device is comparable to traditional needle and syringe delivery for eliciting an immune response. A secondary objective was to compare the safety of the two delivery methods.

Detailed Description: Needle-free jet injection devices create a fine stream of pressurized liquid that is able to deliver vaccines and other pharmaceutical products beneath the skin. Design aspects such as quality, pressure, orifice size, angle of injection relative to skin and injection stream coherence control the depth to which the product is delivered. This technology provides a safer delivery option for patients and healthcare staff by removing the need for needles for the administration of vaccines.

In addition to improved safety, additional benefits of using jet injectors include more consistent and reliable dose volume delivery, reduced vaccine waste, diminished need to transport large quantities of sharps, reduced risk of needle sticks, syringe reuse, and costs associated with sharps waste. Jet injectors offer a needle-free procedure to those individuals who are adverse to needles.

This study compared the efficacy of a disposable syringe jet injection device (Stratis) with traditional needle and syringe (NS) administration for the delivery of a trivalent inactivated influenza vaccine. Efficacy was evaluated by comparing measures of hemagglutination inhibition (HI); specifically GMTs, seroconversion and seroprotection. Safety of the two administration devices was evaluated by comparison of incidence of solicited local and systemic adverse events.

Recruitment & Eligibility

Inclusion Criteria

Female and male subjects ages 18 to 59 years
Healthy volunteers
Able to provide informed consent and understand study procedures per ICH/GCP guidelines
Plans to remain in study area for length of the trial; able to adhere to study visit and follow-up schedule
Able to complete study diary

Exclusion Criteria

Unwilling or unable to undergo the two blood draws per protocol
Have received influenza vaccination in the last twelve months
Have received any vaccination in the last month
Currently taking antibiotics, steroids, phenytoin, chemotherapy, or other immunosuppressive drugs
Received recent blood, blood products, or parenteral preparations of immunoglobulin (within 3 months)
Suffers from allergic reactions to egg, gelatin, or neomycin or has a history of anaphylactic shock, asthma, urticaria, or other allergic reactions to vaccinations.
Had any serious adverse event associated with a prior vaccination
Has immunodeficiency or autoimmune disease (including HIV)
History of chronic alcohol abuse
Participating in another study concurrently
Pregnant or breastfeeding during the study

Primary Outcome Measures

Name	Time	Method
The Percentage of Participants Achieving Seroconversion	28 days	Seroconversion is defined as a 4-fold rise in HAI titer in post-immunization serum relative to pre-immunization serum, or if pre-immunization serum had an undetectable titer (\<1:10), attainment of a post-immunization titer of ≥1:40.
Anti Influenza Hemagglutination Inhibition (HAI) Antibody Geometric Mean Titers (GMT)	28 days	The GMT criterion for non-inferiority for the upper limit of the 95% CIs of the GMT ratio (GMT with Needle-Free / GMT with Needle and Syringe) antigen will not exceed 1.5 fold.

Secondary Outcome Measures

Name	Time	Method
Percentage of Subjects With Solicited Local or Systemic Adverse Events	4 days	Vaccine reactogenicity will be collected on a patient-completed diary card daily for seven days post-vaccination. The following adverse events will be solicited on the diary card: injection site tenderness, injection site pain, injection site redness, injection site swelling, injection site itching, injection site bruising, fatigue, muscle aches, headache, decreased appetite, fever, pruritus.