Final answer:
Viral load refers to the amount of virus in a sample of an infected individual's blood. It is a measure of how much HIV is present in the body.
Step-by-step explanation:
Viral load refers to the amount of virus in a sample of an infected individual's blood. It is a measure of how much HIV is present in the body. The viral load is an important indicator of disease progression and helps to evaluate the effectiveness of HIV therapy.