title: Aerosol vaccination induces robust protective immunity to homologous and heterologous influenza infection in mice.
abstract: Live-attenuated influenza vaccine (LAIV) delivered by large droplet intranasal spray is efficacious against infection. However, many of the large droplets are trapped in the external nares and do not reach the target nasal airway tissues. Smaller droplets might provide better distribution yielding similar protection with lower doses. We evaluated 20 and 30 μm aerosol delivery of influenza virus in mice. A 15s aerosol exposure optimally protected against homologous and heterologous influenza infection and induced a robust immune response. These results demonstrate the feasibility of nasal vaccination using aerosolized particles, providing a strategy to improve vaccine efficacy and delivery.
authors.affiliation: College of Veterinary Medicine, Department of Infectious Diseases, University of Georgia, Athens, GA 30602, USA.
authors.forename: Jennifer Humberd
authors.initials: JH
authors.lastname: Smith
authors.forename: Paula
authors.initials: P
authors.lastname: Brooks
authors.forename: Scott
authors.initials: S
authors.lastname: Johnson
authors.forename: S Mark
authors.initials: SM
authors.lastname: Tompkins
authors.forename: Koren M
authors.initials: KM
authors.lastname: Custer
authors.forename: Debra L
authors.initials: DL
authors.lastname: Haas
authors.forename: Raydel
authors.initials: R
authors.lastname: Mair
authors.forename: Mark
authors.initials: M
authors.lastname: Papania
authors.forename: Ralph A
authors.initials: RA
authors.lastname: Tripp
mesh_terms: D000281:Administration, Intranasal; D000336:Aerosols / Q000008:administration & dosage*; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006385:Hemagglutination Inhibition Tests; D007252:Influenza Vaccines / Q000008:administration & dosage / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D009976:Orthomyxoviridae Infections / Q000517:prevention & control*; D014611:Vaccination / Q000379:methods*
chemical_list: D000336:Aerosols; D000914:Antibodies, Viral; D007252:Influenza Vaccines