Synthesis and Processing of Avian Sarcoma Retrovirus RNA; The Viral and Cellular Forms of the Abelson (abl) Oncogene; Molecular Structure, Biology, and Genetics of Prions; Bacteriophage [phi]6: A Unique Virus Having a Lipid-Containing Membrane and a Genome Composed of Three dsRNA Segments; Baculovirus Vectors for Expression of Foreign Genes; Rotavirus and Adult Diarrhea; Viral-Bacterial Synergistic Interaction in Respiratory Disease; African Swine Fever; Carrier-Mediated Delivery of Antiviral Agents.