Vaccine
Volume 27, Issue 34, Pages 4551-4738 (23 July 2009)
http://www.sciencedirect.com/science/journal/0264410X

Regular Papers
A new, rapid, and promising approach to aerosol immunization: Inflatable bags and valved masks
Pages 4571-4575
John V. Bennett, Jorge Fernandez de Castro, Roberto Martinez Poblete, Maria Luisa Garcia Alcantara, Esperanza Gallardo Diaz, Miguel Angel Molina Angeles, Rosa Maria Wong Chew, Eloisa Arias Toledo, Clyde Witham, Jose Ignacio Santos Preciado

Abstract
Booster doses of MMR vaccine equal in dosage to injected doses were aerosolized into a 3/4 l bag that inflated in 4 s. The bag was then attached to valved masks, and its contents rapidly inhaled in one or two deep breaths by preschool Mexican children. Antibody responses in the children exposed to the aerosolized measles component were superior to those noted after injection, while responses to the mumps and rubella components were equivalent. The new method appears to be effective, safe, and has several advantages over previously used methods. Further explorations of the approach seem merited.