Clinical Trial: FluMist in Egg Allergic Patients
Study Status: Completed
Recruit Status: Unknown status
Study Type: Interventional
Official Title: Flu Vaccine in Egg-allergic Patients Minimizing Injections Safety Trial
Brief Summary:
With the growing public health concerns of seasonal influenza and H1N1 in the United States, the primary means by which this can be addressed is with prevention, namely, vaccination against the influenza virus. The only individuals not able to receive this vaccination in the primary care provider's office are those patients with egg allergies and, in rare circumstances, individuals with allergies to other components of the vaccine. Current guidelines allow for the administration of the influenza vaccine to patients with egg allergy using vaccines with low egg protein (ovalbumin) content or by using skin testing followed by a 5-dose desensitization protocol. Since this is impractical to perform in the primary care office and cumbersome for allergists, many egg-allergic patients simply do not receive the influenza vaccine, leaving them more vulnerable to the disease and more likely to become a source of contagion.
Several studies have suggested that influenza vaccination using a 1-2 dose protocol may be safe. This fact is due in large part to the low ovalbumin (egg protein) content in modern influenza vaccines. All studies of influenza vaccination in egg-allergic patients have been done using intramuscular trivalent inactivated influenza vaccine (TIV). However, the trivalent live-attenuated, cold-adapted influenza vaccine (LAIV), which is delivered intranasally, has a lower published ovalbumin content than the injectable vaccines, suggesting that it may also be well-tolerated by egg-allergic patients. According to several studies, LAIV may be more efficacious than TIV in children.
It is the goal of the investigators to evaluate the safety of immunizing egg-allergic individuals with the LAIV.
Detailed Summary: Patients with egg allergy will be recruited into the study. Since the trivalent live-attenuated, cold-adapted influenza vaccine (LAIV) contains the lowest amount of egg protein of all available influenza vaccines on the market, those who are eligible to receive the intranasal formulation (LAIV group) (ie age 2-49y, not asthmatic) will receive FluMist; others will receive the intramuscular injection in a single dose without skin testing (TIV group). All subjects will be monitored for 30 minutes post-vaccine for any signs/symptoms of an immediate allergic reaction. Subjects will also be followed-up by phone 24-48 hours after administration to assess for any delayed allergic reaction. Data will be collected for one entire Influenza season (2010-2011).
Sponsor: Walter Reed Army Medical Center
Current Primary Outcome: To estimate the safety of LAIV in egg-allergic patients receiving the LAIV. [ Time Frame: within 48 hours after vaccine administration ]
Original Primary Outcome: Same as current
Current Secondary Outcome: To estimate the safety of a single, full-strength dose of TIV in egg allergic patients. [ Time Frame: Within 48 hours of vaccination ]
Original Secondary Outcome: Same as current
Information By: Walter Reed Army Medical Center
Dates:
Date Received: November 24, 2010
Date Started: September 2010
Date Completion: June 2011
Last Updated: November 24, 2010
Last Verified: November 2010
