The purpose of the study is to evaluate the relative bioavailability (BA) and the effect of food on the pharmacokinetics (PK), and the safety and tolerability of VX-147 test tablet formulation.

This clinical trial information was submitted voluntarily under the applicable law and, therefore, certain submission deadlines may not apply. (That is, clinical trial information for this applicable clinical trial was submitted under section 402(j)(4)(A) of the Public Health Service Act and 42 CFR 11.60 and is not subject to the deadlines established by sections 402(j)(2) and (3) of the Public Health Service Act or 42 CFR 11.24 and 11.44.).

Key Inclusion Criteria:

• Body mass index (BMI) of 18.0 to 32.0 kilogram per square meter (kg/m^2), inclusive
• A total body weight greater than 50 kg

Key Exclusion Criteria:

• History of febrile illness or other acute illness that has not fully resolved within 14 days before the first dose of study drug
• Any condition possibly affecting drug absorption

Other protocol defined Inclusion/Exclusion criteria may apply.

Details on Vertex data sharing criteria and process for requesting access can be found at: https://www.vrtx.com/independent-research/clinical-trial-data-sharing.