NCT01246999

Effect of Age and Prior Immunity to Response to Seasonal Influenza Vaccines in Children

Evaluation of the Effect of Age and Prior Immunity on the Response to Live or Inactivated Seasonal (A/California/7/2009-like, A/Perth/16/2009-like, and B/Brisbane/60/2008-like (B/Victoria Lineage) Influenza Vaccines in Children

• Status: Completed
• Phase: Phase 4
• Study type: Interventional
• Enrollment: 34 (actual)
• Sponsor: University of Rochester · Academic / Other
• Sex: All
• Age: 2 Years – 9 Years
• Healthy volunteers: Accepted

Summary

A total of 88 children between 2 and 9 years of age will be randomized to receive a two dose schedule of either licensed live attenuated trivalent seasonal influenza vaccine (LAIV) or licensed inactivated seasonal influenza vaccine (TIV)or TIV followed by LAIV or LAIV followed by TIV separated by 28 days. Children with a laboratory documented history of prior H1N1 infection will be excluded.

Detailed description

The study will be conducted as a randomized, prospective, open-label evaluation of the clinical tolerability, vaccine virus shedding, and serum and mucosal antibody response to vaccination with either live trivalent influenza vaccine (LAIV) or trivalent influenza vaccine (TIV) in healthy children between the ages of 2 and 9 years. Children will be screened for antibody to A/Brisbane/57/07 (H1N1) and A/California/07/09 (H1N1), A/Perth/16/2009 (H3N2) and B/Brisbane/60/2008 before and at indicated times after the start of the study. They will not be randomized based on antibody levels. Children with prior documented infection with the 2009 pandemic H1N1 virus will be excluded. Vaccine will be administered on days 0 and 28. Safety of vaccination will be assessed using symptoms collected by parents for 7 days after each dose of vaccine. Serum will be obtained prior to and on day 28 following each dose of vaccine and assessed for antibody by HAI, ELISA, and neutralization techniques. Nasal secretions will be obtained by nasal wick prior to and on day 28 after each dose and assessed for HA-specific IgA (immune globulin A) and IgG (immune globulin G)antibody by ELISA. Nasal swabs will be obtained on days 2, 4, and 7 after each dose of live vaccine and assessed for the presence and magnitude of vaccine virus shedding of the live attenuated vaccine by rtRT-PCR (real-time reverse transcriptase polymerase chain reaction)and TCID50 (50% tissue culture infectious doses)on MDCK(Madin Darby Canine Kidney) cells.

Conditions

• Influenza

Interventions

Type	Name	Description
BIOLOGICAL	Live attenuated Influenza vaccine	0.2 mL dose delivered through nasal spray, 0.1 ml in each nostril, 2 doses separated by 28 days
BIOLOGICAL	Trivalent Influenza Vaccine	.25 mL given intramuscularly to children 24 to 36 months of age, 2 doses given 28 days apart, .5 mL given intramuscularly to children 37 months to 9 years of age, 2 doses given 28 day s apart.
BIOLOGICAL	TIV followed by LAIV	TIV .25 mL given intramuscularly to children 24 to 36 months of age or .5 mL given intramuscularly to children 37 months to 9 years of age, followed by FluMist 0.2 mL delivered by nasal spray (.1 mL in each nostril)28 days later
BIOLOGICAL	LAIV followed by TIV	LAIV .2 mL given through nasal spray (.1 mL in each nostril) Followed by TIV .25 mL given intramuscularly to children 24 to 25 months of age or .5 mL given intramuscularly to children 36 months to 9 years of age 28 days later

Timeline

• Start date: 2010-10-01
• Primary completion: 2013-01-01
• Completion: 2013-06-01
• First posted: 2010-11-24
• Last updated: 2016-12-29
• Results posted: 2016-10-19

Locations

2 sites across 1 country: United States