CD4 Counts »

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CD4 cells are white blood cells, which organise your body’s response to invading micro-organisms. (T-cells is a phrase you might also hear, but this really means the same thing.) They form the basis of the body’s defence mechanism.

The CD4 count is a measure of the health of your body’s immune system. Usually, an adult’s CD4 count is anywhere between 500 and 1200 cells per cubic millimetre of blood, with women having naturally slightly higher counts than men. …