Intervention X provides passive immunity because the toxoid is an inactive antigen, whereas Intervention Y provides active immunity because the monoclonal antibodies actively neutralize the toxin.

Intervention X stimulates the host's B lymphocytes to undergo clonal selection and produce memory cells, offering long-term protection, whereas Intervention Y provides immediate, temporary protection because the injected antibodies do not stimulate the production of memory cells.

Intervention X relies on cytotoxic T lymphocytes to destroy infected host cells directly for immediate protection, whereas Intervention Y depends on the monoclonal antibodies multiplying within the lymphatic system to provide lifelong immunity.

Both interventions induce active immunity, but Intervention X is preferred for immediate outbreak control because the toxoid stimulates faster clonal expansion than pre-formed monoclonal antibodies.