Adenoviridae Article Epitopes Hemagglutinins Influenza Vaccines Influenza virus Influenza virus hemagglutinin M1 capsid protein MultiBac Orthomyxoviridae Peptides animal cell antigenic epitope baculovirus expression system baculovirus expression vector system (BEVS) capsid protein controlled study epitope genetics hemagglutinin human immunization influenza vaccine insect cell nonhuman peptide priority journal protein and peptide display protein assembly unclassified drug