Two to 3 days after viral amplification in the lung, measles virus spreads to local lymphoid tissue, leading to viremia ... approximately 2 days before the rash and may persist up to 2 days ...

However, in patients on antiretroviral therapy (ART), the clinical implication of a detectable viral load <50 copies/mL (i.e., low-level viremia) is uncertain. To address this issue, investigators ...

The threshold at which low-level viremia (LLV) becomes predictive of disease progression varies between studies, although evidence shows that incomplete viral suppression leads to the accumulation ...