The purpose of this study is to explore the antiviral effect of JNJ-53718678 at 2 dose levels (80 milligrams \[mg\] and 500 mg) once daily for 7 days in adults with Respiratory Syncytial Virus (RSV) infection, as measured by RSV viral load in nasal secretions by quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay.
This study will be performed to explore the antiviral activity, clinical outcomes, safety, tolerability, and pharmacokinetics of JNJ-53718678 in adult participants infected with RSV. The study will include both participants who are otherwise healthy (ie, without underlying condition) or who have comorbid conditions (eg, asthma, chronic obstructive pulmonary disease (COPD), cardiovascular disease, other chronic diseases), with the exception of immunocompromised participants, presenting for medical care but not requiring hospitalization. The study will include a screening period (Day -1 to Day 1), a treatment Period (Day 1 to Day 8), and a follow-up period (Day 9 to Day 28). Safety evaluations will include adverse events, laboratory tests, electrocardiogram, vital signs, physical examination, and specific toxicities.
Participants will receive 500 mg dose of JNJ-53718678 oral solution once daily for 7 days.
Participants will receive 80 mg dose of JNJ-53718678 oral solution along with the matching placebo to the same total volume as for the 500 mg dose once daily for 7 days.
In treatment B, participants will receive matching placebo along with JNJ-53718678 to maintain the same total volume as for the 500 mg dose once daily for 7 days. In treatment C, participants will receive matching placebo to the same total volume as for the 500 mg dose once daily for 7 days.
Bahía Blanca, Argentina
Bahía Blanca, Argentina
Barrio Parque Velez Sarfield, Argentina
CABA, Argentina
Ciudad de La Plata, Argentina
Ciudadela, Argentina
Córdoba, Argentina
Córdoba, Argentina
Córdoba, Argentina
General Roca, Argentina
Rosario, Argentina
San Miguel de Tucumán, Argentina