title: Newcastle disease vaccination with the V4 strain in Malawi: laboratory and field studies.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000096:biosynthesis; D002645:Chickens; D004196:Disease Outbreaks / Q000662:veterinary*; D008295:Malawi; D009521:Newcastle Disease / Q000517:prevention & control*; D009522:Newcastle disease virus / Q000276:immunology*; D014611:Vaccination / Q000662:veterinary; D014765:Viral Vaccines / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D014765:Viral Vaccines