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Important: immunizations for everyone!!

Acquired Immunity

Great immune system chart

Cells of the immune system

Cells involved in the immune system.

PEDs immunization schedule. Pediatric nursing.

Origin and differentiation of immune system cells The human immunological system comprises several organs including the spleen, thymus, lymph nodes and bone marrow, each contributing to the development of immune cells. Shown above is a nice overview of these immune cells in terms of the stem cell origin and subsequent differentiation.