A Study of Intismeran Autogene (V940) Plus Pembrolizumab (MK-3475) Versus Placebo Plus Pembrolizumab in Participants With Non-small Cell Lung Cancer (V940-002)

Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Has undergone margin negative, completely resected non-small cell lung cancer (NSCLC), and has pathological Stage II, IIIA, IIIB (N2) squamous or nonsquamous tumor, node, metastasis (TNM) staging per American Joint Committee on Cancer (AJCC) Eighth Edition guidelines. * Has no evidence of disease before randomization. * Has received at least one dose of adjuvant treatment with standard of care platinum doublet chemotherapy. * No more than 24 weeks have elapsed between surgical resection of curative intent and the first dose of pembrolizumab. * Participants who are hepatitis B surface antigen (HBsAg) positive are eligible if they have received hepatitis B virus (HBV) antiviral therapy for at least 4 weeks and have undetectable HBV viral load prior to randomization. * Participants with history of hepatitis C virus (HCV) infection are eligible if HCV viral load is undetectable at screening. * Human immunodeficiency virus (HIV)-infected participants must have well controlled HIV on anti-retroviral therapy (ART). Exclusion Criteria: The main exclusion criteria include but are not limited to the following: * Diagnosis of small cell lung cancer (SCLC) or, for mixed tumors, presence of small cell elements, or has a neuroendocrine tumor with large cell components or a sarcomatoid carcinoma. * HIV-infected participants with a history of Kaposi's sarcoma and/or Multicentric Castleman's D…