RecruitingPhase 2Drug trialSingle-Center Eval of Clinical & Radiological Benefit AHCC in Combo W/ SOC Tx for HPV+ Pts W/ HNSCCThis is a phase 2, single-arm, open-label clinical trial determining safety and tolerability of AHCC in subjects with HPV-positive patients with Head and Neck Squamous Cell Carcinoma. These are subjects who have undergone surgery or will be undergoing surgery.