The immune system does not eliminate antigenic cancer cells for a number of reasons, for example:
> damage
to the effectors abilities of immunocompetent cells
> immunosuppressive factors
Vibrio genus involves many species, only some serotypes of V.cholerae are pathogens of cholera. Which of the following causative agents of cholera?
V.cholerae serogroups non O1 and non O139
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