CD4 and pneumocystosis: A 29-year-old man with a history of HIV on antiretroviral therapy (bictegravir/emtricitabine/tenofovir alafenamide) with last absolute CD4 count 155 cells/μL, undetectable viral load, Kaposi sarcoma (biopsy confirmed in January 2021), and Pneumocystis jirovecii pneumonia (PJP) presented to the emergency department for evaluation of fever.