title: Distemperoid Virus Interference in Canine Distemper.
abstract: A distemper virus modified by ferret passage so as to become a harmless vaccine for foxes and dogs exhibits the interference or cell-blockade phenomenon with respect to a virulent distemper infection in foxes. Ten control foxes receiving virulent distemper virus died, while 30 foxes receiving distemperoid virus in addition lived.
authors.forename: R G
authors.initials: RG
authors.lastname: Green
authors.forename: C S
authors.initials: CS
authors.lastname: Stulberg