The main function of HLA class II antigens is to ensure interaction between :
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T lymphocytes and macrophages
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T-helpers and macrophages
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transformed cells and cytotoxic
T-lymphocytes
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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