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 ) .

Pick your answer from: (1). They have to for their job .. (2). None of the above choices .. (3). They are a recovering addict .. (4). They have a medical condition ..
Answer the following question: What may be the reason for needing to have their levels checked ?
(4).