A Study to Assess the Relative Oral Bioavailability of a Single Dose of JNJ-63623872/Oseltamivir Fixed-dose Combination Tablet and Single Agent Concept Formulations of JNJ-63623872 Compared to Their Respective Reference Formulation in Healthy Adult Participants

The purpose of this study is to assess the rate and extent of absorption of JNJ63623872 following administration of a single oral dose of 2\*300 milligram (mg) given as 2 concept single agent tablet formulations compared to the administration of 2\*300 mg JNJ63623872 reference tablets, under fasted conditions in healthy adult participants and to assess the rate and extent of absorption of JNJ63623872 and oseltamivir following administration of a single oral dose of 2\*300 mg/37.5 mg JNJ63623872/ oseltamivir given as a concept fixed dose combination (FDC) tablet formulation compared to the coadministration of 2\*300 mg JNJ63623872 tablets (reference formulation) and 1\*75 mg oseltamivir capsule, under fasted conditions in healthy adult participants.