A Phase 1/2 Study to Evaluate MEDI4736

Inclusion Criteria:

* Age 18 or older.
* In the dose-escalation phase: histologically- or cytologically- confirmed advanced solid tumor that is refractory to standard therapy and for which no standard therapy exists.
* In the dose-expansion phase: histologically- or cytologically- confirmed advanced solid tumor where if an approved first-line therapy is available, participants must have failed, be intolerant to, be ineligible for, or have refused
* Eastern Cooperative Oncology Group (ECOG) status of 0 or 1.
* Adequate organ and marrow function.
* Participants must have at least 1 measurable lesion.
* Available archived tumor tissue sample.
* Willingness to provide consent for biopsy sample (dose-expansion only)

Exclusion Criteria:

* Any prior Grade ≥ 3 immune-mediated adverse event (imAE) while receiving immunotherapy
* Prior exposure to any anti-PD-1 or anti-PD-L1 antibody
* Any concurrent chemotherapy, immunotherapy, biologic or hormonal therapy for cancer treatment.
* Prior treatment with immunotherapy agents including, but not limited to, tumor necrosis factor receptor superfamily agonists or checkpoint inhibitors or natural killer (NK) cell inhibitors.
* Active or prior documented autoimmune disease within the past 2 years
* History of primary immunodeficiency
* History of organ transplant that requires use of immunosuppressives
* Symptomatic or untreated central nervous system (CNS) metastases requiring concurrent treatment
* Other invasive malignancy within 2 years
* Women who are pregnant or lactating
* Uncontrolled intercurrent illness
* Known history of tuberculosis
* Known to be human immunodeficiency virus (HIV) positive
* Known to be Hepatitis B or C positive (except HCC participants)