The document provides nucleic acids, polypeptides, and viruses containing nucleic acids and/or polypeptides. The document also provides methods for using viruses to treat cancer patients. Specifically, the document provides nucleic acid molecules encoding viral hemagglutinin (H) polypeptides, viral H polypeptides, and viruses containing nucleic acids and/or H polypeptides. Such viruses are useful for vaccinations and for treating cancer patients as the viruses are not shed.