DETECTION OF AN AVIRULENT VIRUS APPARENTLY RELATED TO FRIEND VIRUS.
D000818:Animals; D000906:Antibodies; D005622:Friend murine leukemia virus; D007106:Immune Sera; D051379:Mice; D009500:Neutralization Tests; D012106:Research; D014714:Vertebrates; D014780:Viruses
D000906:Antibodies; D007106:Immune Sera
ANTIBODIES; EXPERIMENTAL LAB STUDY; IMMUNE SERUMS; MICE; NEUTRALIZATION TESTS; VERTEBRATE VIRUSES