Antigen
Antigen, when injected in the body activates its specific lymphocytes in the

spleen lymphoid tissue
blood circulation
draining lymph nodes
MALT (mucosa associated

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Antigen
During the lag period between antigen contact and detection of adaptive immunity,

innate immune effectors are eliminating antigen
new B and T cells with the appropriate antigen specificity must be produced in the bone marrow
innate immunity blocks the activation of adaptive immune effector cells
antigen is hidden from the immune system in macrophages

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Antigen
CD antigens

are expressed on immune cells to mark them for separation
are each expressed on only one cell type
function as receptors for cytokine and CAMs
allow leukocytes to recognize antigen

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