A percentage of people with HIV do have normal blood tests. This is because the vast majority of AIDS patients, will experience a relatively long period of asymptomatic HIV infection. During this period, the patient does not have any obvious clinical symptoms, and the routine blood tests do not reflect any abnormal symptoms, and the patient’s HIV virus does not replicate during this period. However, when a patient is newly infected with HIV, there are abnormalities in the blood count, such as an increase in white blood cells or a decrease in lymphocytes. When the patient enters the onset of AIDS, there may be abnormalities in white blood cells, platelets and red blood cells. However, these abnormal or normal blood tests alone cannot determine whether a patient is infected with HIV.