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CD4 T cells |
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CD4 T cells Helper T cells, see there How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Cassian Yee at the Fred Hutchinson Cancer Research Centre in Seattle extracted immune cells from the patient and found that a small proportion of them, called CD4 T cells, naturally attacked a protein found on nearly three-quarters of the cancer cells. A small frequency of CD4 T cells specific for subtype H5N1 was detected in several persons at baseline, and seasonal vaccine administration enhanced the frequency of such reactive CD4 T cells. This prolonged, low-level activation of the immune system is associated with a gradual decline in the numbers of CD4 T cells measurable in the blood and a spreading dysfunction among remaining CD4 T cells. |
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