2792 Prognostication with Lymphocyte Counts and Their Kinetics During Chemoradiotherapy for HPV-positive Oropharyngeal Carcinoma Alec Hughes, Carlton Johnny,Jie Su, Enrique Sanz Garcia,Anna Spreafico,Lillian Siu, Lawson Eng,Scott Bratman, B. C. John Cho,Ezra Hahn,Andrew Hope,Ali Hosni,John Kim, Nauman Malik,Brian O'Sullivan,C. Jillian Tsai,John Waldron,John De Almeida,Christopher Yao,Li Tong,Wei Xu,Shao Hui Huang,Andrew McPartlin