Clonal, antigen-specific, memory-forming response (days-weeks). T cells (cellular) + B cells (humoral) with V(D)J-rearranged receptors. Janeway's 'delayed' arm, discovered by jawed-vertebrate ancestor ~500 Mya.
Clonal, antigen-specific, memory-forming response (days-weeks). T cells (cellular) + B cells (humoral) with V(D)J-rearranged receptors. Janeway's 'delayed' arm, discovered by jawed-vertebrate ancestor ~500 Mya.