The immune system does not eliminate antigenic cancer cells due to the presence of immunosuppressive factors, for example:
> transforming growth factor
> gangliosides
> prostaglandin E
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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