and Review of Reviews.- Methods for Obtaining Infective Nucleic Acids.- Methods for Transfecting Cells with Nucleic Acids of Animal Viruses.- Comparisons of the Transfection Methods.- Combinations of the Transfection Methods.- Host Range.- Interference.- Physical Evidence for Entry of Nucleic Acids.- Comparisons with Methods for Transfection with Nucleic Acids from Plant Viruses and Bacteriophages.- Comparisons with Methods for Genetic Transformation.- The Changing of Cellular Activities by Treatment with Cellular Ribonucleic Acids.- Vistas.- Summary.- References.Springer Book Archives