defense system involved in eliminating virally-infected cells
antibodies interact with which innate defenses?
phagocytosis and the complement system
which cells directly attack abnormal cells in the body?
Cytotoxic T cells
Mycobacterium tuberculosis is an intracellular pathogen of humans. After being ingested by a macrophage, it prevents formation of the ___________ by preventing fusion of the phagosome with the ___________________.