Noninfectious forms of Newcastle disease and influenza viruses; studies on noninfectious virus occurring within cells that are producing fully infectious virus.
D000818:Animals; D009521:Newcastle Disease; D009522:Newcastle disease virus; D009975:Orthomyxoviridae; D014777:Virus Diseases; D014780:Viruses
INFLUENZA VIRUSES; NEWCASTLE DISEASE/virus; VIRUSES