Pre-operative Atezolizumab in Patients With Resectable, Human Papillomavirus Related Oropharyngeal Carcinoma

Inclusion Criteria: * The subject is \>= 18 years old on the day of consent * Sexually active subjects (men and women) must agree to use medically accepted barrier methods of contraception (eg, male or female condom) during the course of the study and for 5 months after the last dose of study drug(s), even if oral contraceptives are also used. All subjects of reproductive potential must agree to use both a barrier method and a second method of birth control during the course of the study and for 5 months after the last dose of study drug(s). * Female subjects of childbearing potential must not be pregnant at screening. Females of childbearing potential are defined as premenopausal females capable of becoming pregnant (ie, females who have had any evidence of menses in the past 12 months, with the exception of those who had prior hysterectomy). However, women who have been amenorrheic for 12 or more months are still considered to be of childbearing potential if the amenorrhea is possibly due to prior chemotherapy, antiestrogens, low body weight, ovarian suppression or other reasons. * A male participant must agree to use a contraception as detailed in this protocol during the treatment period and for at least during the active treatment plus an additional 90 days (a spermatogenesis cycle) for study treatments with evidence of genotoxicity at any dose\] after the last dose of study treatment and refrain from donating sperm during this period. * The subject has a histologic or …