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There are three main types of T cells: T helper cells (Th cells), which allow other immune cells to go into action; T suppressor cells (Ts cells), which stop specific immune reactions from occurring; and T cytotoxic cells (Tc cells), which kill cells that are cancerous or infected with viruses. Like B cells, to which they are related, T cells have surface receptors that make them specific for particular antigens.
Yellow stands for grain and freedom from need. Green symbolizes the forests and hope. Red represents bloodshed and courage. Effective date: 20 March 1989.
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