n the thymus following occurs: Choose the correct combination of answers:
I a) rearrangement
of T-cell receptor genes ;
c) development of CD4 and CD8 T cells;
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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