Inclusion Criteria:

1. Have histological diagnosis of squamous cell cancer of the head & neck with confirmation of HPV positivity or squamous, non-squamous, adenosquamous, carcinoma or adenocarcinoma of the cervix which HPV positivity is not required
2. Have measurable and/or evaluable disease by RECIST 1.1
3. Have ECOG performance status of 0 or 1
4. Have adequate organ function defined by the protocol.:

Exclusion Criteria:

1. Has any prior Grade ≥3 immune-related adverse event (irAE) while receiving immunotherapy, including anti-CTLA-4 treatment, or any unresolved irAE >Grade 1.
2. Has a diagnosis of immunodeficiency or is receiving any systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to Day 1 of trial treatment.
3. Has any concurrent chemotherapy, immunotherapy, biologic or hormonal therapy for invasive malignancy within 2 years. Concurrent use of hormones for non-cancer-related conditions (eg, insulin for diabetes and hormone replacement therapy) is acceptable.
4. Has an active autoimmune disease requiring systemic treatment within the past 3 months or a documented history of clinically severe autoimmune disease, or a syndrome that requires systemic steroids or immunosuppressive agents.
5. Has implanted medical device(s) that pose a high risk for colonization and/or cannot be easily removed (e.g., prosthetic joints, artificial heart valves, pacemakers, orthopedic screw(s), metal plate(s), bone graft(s), or other exogenous implant(s)). NOTE: More common devices and prosthetics which include arterial and venous stents, dental and breast implants, and venous access devices (e.g., Port-a-Cath or Mediport) are permitted. Sponsor must be contacted prior to consenting any subject who has any other device and/or implant