Disclosed are peptides comprising a monomeric Fc fragment of an immunoglobulin recognized by a neonatal receptor (FcRn)； an influenza HA protein； and a trimerization domain. Disclosed are compositions comprising one or more of the peptides described herein. Disclosed are nucleic acid sequences capable of encoding any one of the peptides described herein. Disclosed are methods for eliciting a protective immune response against influenza comprising administering to a subject an effective amount of a composition comprising a monomeric Fc fragment of an immunoglobulin recognized by a FcRn； an influenza HA protein； and a trimerization domain, wherein the administering is to a mucosal epithelium. Disclosed are methods of treating a subject exposed to influenza or at risk of being exposed to influenza comprising administering to the subject an effective amount of a composition comprising a monomeric Fc fragment of an immunoglobulin recognized by a FcRn； an influenza HA protein； and a trimerization domain, wherein the administering is to a mucosal epithelium.
