Study of Pembrolizumab/Vibostolimab Coformulation (MK-7684A) in Combination With Chemotherapy Versus Pembrolizumab Plus Chemotherapy in Participants With Metastatic Non-Small Cell Lung Cancer (MK-7684A-007/KEYVIBE-007)

The main inclusion and exclusion criteria include but are not limited to the following:

Inclusion Criteria:

A histologically or cytologically confirmed diagnosis of Stage IV squamous or non-squamous NSCLC.
Has not received prior systemic treatment for metastatic NSCLC.
Has measurable disease based on RECIST 1.1, as determined by the local site assessment.
Has a life expectancy of at least 3 months.
Males: Use contraception unless confirmed to be azoospermic; Females: Women of childbearing potential use highly effective contraceptive method.

Exclusion Criteria:

Known additional malignancy that is progressing or has required active treatment within the past 3 years.
Known active central nervous system (CNS) metastases and/or carcinomatous meningitis.
Severe hypersensitivity to vibostolimab, pembrolizumab, chemotherapy components, and/or any of its excipients.
Diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 7 days before the first dose of study medication.
Active autoimmune disease that has required systemic treatment in past 2 years (ie, with use of disease modifying agents, corticosteroids, or immunosuppressive drugs). Replacement therapy (eg, thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency) is not considered a form of systemic treatment and is allowed.
History of (noninfectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease.
Has an active infection requiring systemic therapy.
Has a known history of human immunodeficiency virus (HIV), Hepatitis B or/and Hepatitis C virus.
Received prior systemic anticancer therapy for metastatic disease.
Received a live or live attenuated vaccine within 30 days before the first dose of study intervention. Administration of killed vaccines are allowed.
History of allogenic tissue/solid organ transplant.
Is unable to interrupt aspirin or other nonsteroidal anti-inflammatory drugs (NSAIDs), other than an aspirin dose ≤1.3 g/day, for a 5-day period (8-day period for long-acting agents, such as piroxicam).
Is unable or unwilling to take folic acid or vitamin B12 supplementation.
Currently participating in or has participated in a study of an investigational agent or has used an investigational device within 4 weeks before the first dose of study intervention.