PF-07921585

The purpose of this study is to learn about the safety and effects of the study medicine (called PF-07921585) in people with cancer that has advanced or spread to other parts of the body.
This study is seeking participants who have any of the following cancer types:
* non-small cell lung cancer
* colorectal cancer
* bladder cancer
* melanoma (a type of skin cancer)
* kidney cancer
* head and neck cancer Participants will receive the study medicine PF-07921585 alone or in combination with another study medicine called sasanlimab at the study clinic.
PF-07921585 will be given as an infusion into a vein or as shots under the skin, once every 3 weeks. Sasanlimab will be given as shots under the skin, also once every 3 weeks.
The experiences of participants receiving the study medicine will be studied to help see if the study medicine is safe and effective. Participants may receive study medicine for up to 2 years, depending on how the cancer responds to the study treatment. Participants may continue receiving study medicine after 2 years if there are any benefits from the study treatment. Participants will attend visits once every 3 weeks with the first 9 weeks having more frequent visits, to check the safety of the study treatment.