Altimmune, Inc. (Nasdaq:ALT), a clinical-stage immunotherapeutics company, today announced positive data from its Phase 2a study of NasoVAX intranasal influenza vaccine and provided an update on its Phase 1b study of HepTcell targeted immunotherapy in chronic hepatitis B infection. Results from the Phase 2a study of NasoVAX™ intranasal flu vaccine in 60 healthy individuals showed 100% seroprotection in the mid- and high-dose groups. Results from the Phase 1b study of HepTCell in hepatitis B infection showed that HepTcell was well tolerated at all doses tested, while the unblinded T-cell immunogenicity results were inconclusive.