Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
To measure anti-influenza systemic and mucosal antibody responses 4 weeks after administration of influenza vaccine (LAIV) to healthy subjects aged 18-49 and to compare responses in subjects receiving Lactobacillus GG (LGG) versus placebo
To assess time course of antibody response after administration of influenza vaccine (LAIV) and to compare responses in subjects receiving LGG versus placebo
18 Years to 49 Years (Adult)
February 21, 2008
January 19, 2011
† Study has passed its completion date and status has not been verified in more than two years.