Other Factors That Affect Viral Load
Different test methods often give different results for the same patient sample. To be comparable the same test method (Target amplification, probe specific amplification, or signal amplification) should be used each time a patient specimen is run. Ideally patient testing should be conducted at the same medical laboratory, using the same viral load test and analyzer. Time of day, fatigue, and stress can also affect viral load values. Recent immunizations or infections can affect the viral load test. Testing should be postponed for at least four weeks after an immunization or infection.
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