Context: I had my doctor visit last week , and had my blood drawn to have my levels checked . I was given the results recently , and was told that my viral load is undetectable , and that my cd4 level is up to 588 , and my liver and kidneys are tolerating the medications . This is all very good news for me . Beamer came up from Broomfield on yesterday for a movie marathon . It was a lot of fun , though I think I missed a good portion of the last movie ( Bummer ) .

Question: What may be the reason for needing to have their levels checked ?
Options:
0. They have to for their job .
1. None of the above choices .
2. They are a recovering addict .
3. They have a medical condition .
Answer: 3