A 28-year-old client presents to the clinic with complaints…

A 28-year-old client presents to the clinic with complaints of fever, muscle aches, sore throat, and swollen lymph nodes. The client reports unprotected sexual intercourse with a new partner approximately two weeks ago.  HIV testing is ordered, and the client’s CD4+ T-cell count is 720 cells/mm³.  Based on these findings, which stage of HIV infection is the client most likely experiencing?