title: Newcastle disease vaccination: the maintenance of virus titre in header tank supplies.
mesh_terms: D000818:Animals; D002645:Chickens; D006799:Housing, Animal; D009521:Newcastle Disease / Q000517:prevention & control*; D013696:Temperature; D014765:Viral Vaccines / Q000592:standards*; D014881:Water Supply
chemical_list: D014765:Viral Vaccines