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Multiple Choice $10$ points

During an annual HIV screening test, Patrick was informed that he had a positive result. Upon reviewing his health history, he recalls having flu$-$like symptoms about four months prior, but he hasn't had health problems since then. Which of the following is most likely true, based on the typical pattern of HIV infection in his case?

Patrick is currently in the initial acute illness phase of infection.

Patrick is not yet producing detectable antibodies to HIV.

Patrick is experiencing a slow immune system decline.

Patrick is probably at his lowest level of CD$4$ cells.