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T cell

Jul 17, 2011

how many types T cells are in our body? what are their function? How are they different from each other? Does HIV attack all types of t cell? Thank you for your service.

Response from Dr. Young

Hello and thanks for your post.

There are several different types of T (or Thymus-derived) cells. Most T cells are either CD4 or CD8's-- otherwise known as T-helper and T-suppressor cells. HIV infects cells that express the CD4 cell surface protein.

For more information on the immune system and T cells, here's a link to an article on the subject on

Be well, BY

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