What Factors Influence a CD4 Cell Count?
The CD4 cell value can change a lot. Time of day, fatigue, and stress can affect the test results. It’s best to have blood drawn at the same time of day for each CD4 cell test, and to use the same laboratory. Infections can have a large impact on CD4 cell counts. When your body fights an infection, the number of white blood cells (lymphocytes) goes up. CD4 counts go up, too. Vaccinations can cause the same effects. It’s best to wait a couple of weeks after you recover from an infection or get a vaccination before you get a CD4 test.
