Antigen
A virus vaccine that can activate cytotoxic T cells must contain

an adjuvant to stimulate T cell division
a high dose of virus particles
virus peptides
live virus

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

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

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Antigen
For specific antigen recognition by T cells,

antigen exposure during T cell maturation is required
antigen is bound by a T cell membrane antibody
denaturation of antigen does not reduce epitope recognition
MHC molecules are not required

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Antigen
CD antigens

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

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