Defective viral particles and viral disease processes.
D005827:Genetics, Microbial; D008954:Models, Biological; D014762:Viral Interference; D014764:Viral Proteins; D014776:Virus Cultivation; D014777:Virus Diseases / Q000209:etiology*; D014780:Viruses / Q000276:immunology*
D014764:Viral Proteins