The purpose of the study is to evaluate safety, tolerability, and pharmacokinetics of VX-828 and VX-828 in triple combination (TC) with Tezacaftor (TEZ)/ VX-118 or TEZ/ deutivacaftor (D-IVA) in healthy participants and VX-828 in combination with D-IVA with or without TEZ in participants with cystic fibrosis (CF).