Although the various components of the two arms may differ, there
is accumulating evidence that both these host responses are in a
close and constant interaction and there is also evidence to suggest
that there is no distinct border between them, as originally thought.
Due to the lymphotrophic and highly cell-associated nature of MDV,
T cell-mediated immune responses are thought to play a more
important role compared to antibody-mediated responses. Since
the nature of MDV is cell-associated, antibodies play an important