host is also described as "subject". Preferably, any of the hosts or subjects described or mentioned herein is an animal.
Usually, an "immunological response" includes but is not limited to one or more of the following effects: the production or activation of antibodies. B cells, helper T cells, suppressor T cells, and/or cytotoxic T cells and/or gamma-delta T cells, directed specifically to an antigen or antigens included in the immunogenic composition of the invention. Preferably, the host will display either a protective immunological response or a therapeutical response.
A "protective immunological response" will be demonstrated by either a reduction or lack of clinical signs normally displayed by an infected host, a quicker recovery time and/or a lowered duration of infectivity or lowered pathogen titer in the tissues or body fluids or excretions of the infected host.