Hemagglutinin Glycoproteins, Influenza Virus/immunology; Influenza A Virus, H1N1 Subtype/immunology; Influenza A Virus, H5N1 Subtype/immunology; Influenza Vaccines/immunology; Plants, Genetically Modified/metabolism; Animals; Antibodies, Viral/blood; Biotechnology/methods; Ferrets; Hemagglutination Inhibition Tests; Hemagglutinin Glycoproteins, Influenza Virus/genetics; Hemagglutinin Glycoproteins, Influenza Virus/metabolism; Humans; Influenza A Virus, H1N1 Subtype/genetics; Influenza A Virus, H5N1 Subtype/genetics; Influenza Vaccines/adverse effects; Influenza Vaccines/genetics; Influenza, Human/prevention & control; Mice; Mice, Inbred BALB C; Plants, Genetically Modified/genetics; Rabbits; Recombinant Proteins/genetics; Recombinant Proteins/immunology; Recombinant Proteins/metabolism; Technology, Pharmaceutical/methods; Nicotiana/genetics; Vaccines, Subunit/adverse effects; Vaccines, Subunit/genetics; Vaccines, Subunit/immunology; Vaccines, Synthetic/adverse effects; Vaccines, Synthetic/genetics; Vaccines, Synthetic/immunology