For female subjects of childbearing potential: Female subjects of childbearing potential must not be pregnant or breastfeeding Be of non-childbearing potential: Or, if of childbearing potential, Female subjects of childbearing potential must: Male subjects with a female partner of childbearing potential must: Have a female partner who is NOT of childbearing potential. Any woman of childbearing potential, unless she: Be of non-childbearing potential: Or, if of childbearing potential, Women of childbearing potential must Female subjects of childbearing potential and male subjects with female partners of childbearing potential must be willing to avoid pregnancy. Women of childbearing potential Be of non-childbearing potential: Or, if of childbearing potential: Female participant without childbearing potential must meet at least one of the following: Female participant of childbearing potential must meet at least one of the following: ORAL CAVITY SQUAMOUS CELL CARCINOMA COHORT: Female of childbearing potential (less than months post-menopausal) or male with a partner of childbearing potential either agrees to be abstinent or uses a medically acceptable form of birth control during the study and for a period of year after if on Arm HPV-ASSOCIATED OROPHARYNX SQUAMOUS CELL CARCINOMA: Female of childbearing potential (less than months post-menopausal) or male with a partner of childbearing potential either agrees to be abstinent or uses a medically acceptable form of birth control during the study and for a period of year after if on Arm Or, if of childbearing potential, Female Children of Childbearing Potential (FCCBP), Female of Childbearing Potential (FCBP) and male subjects that have reached puberty must agree to undergo physician-approved reproductive education and discuss the side effects of the study therapy on reproduction with parent(s) and/or guardian(s). Female subjects of childbearing potential must not be pregnant at screening. Male subjects with a female partner of childbearing potential must: . Female subjects of childbearing potential may participate, providing they meet the following conditions: Not a woman of childbearing potential as defined in Appendix VIII OR Or, if of childbearing potential, Female participants of childbearing potential must not be pregnant at screening Or, if of childbearing potential, A female is eligible to enter and participate in this study if she is of non-childbearing potential (i.e., physiologically incapable of becoming pregnant) or if she is of childbearing potential Female subjects of childbearing potential must not be pregnant at screening. Female participants of non-childbearing potential, ? years of age Or, if of childbearing potential, Women of childbearing potential Subjects who desire to get pregnant a female of childbearing potential within the next . years Women of childbearing potential and men with female sexual partners of childbearing potential must agree to abstain from sexual intercourse or use a double barrier method to determine if a woman is of childbearing potential (http://www.nccn.org/professionals/physician_gls/f_guidelines.asp). A woman must be either: Not of childbearing potential: postmenopausal (more than [>] years of age with amenorrhea for at least months; If, of childbearing potential must be practicing a highly effective method of birth control Or, if of childbearing potential, of non-childbearing potential (i.e., physiologically incapable of becoming pregnant, including any female who is post- menopausal); or, Or, if of childbearing potential: Any woman of childbearing potential or male partner of a woman of childbearing potential unwilling to employ acceptable contraception throughout the study and for at least days after the last dose of the study drug For female patients of childbearing potential, all of the following criteria must be met: If the participant is of childbearing potential, she should be at least months postpartum Female subjects of non-childbearing potential may be enrolled in the study. Female subjects of childbearing potential may be enrolled inthe study, if the subject: Female subjects of non-childbearing potential may be enrolled in the study. Female subjects of childbearing potential may be enrolled in the study, if the subject: Or, if of childbearing potential, Non-Childbearing Potential: Male subjects and their partners must meet one of the following criteria to be considered of non-childbearing potential: