Correlated Drug Terms (2)

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	Name (Synonyms)	Correlation
drug1289	JNJ-53718678 250 mg Wiki	1.00
drug1822	Placebo Wiki	0.06

Correlated MeSH Terms (3)

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	Name (Synonyms)	Correlation
D018357	Respiratory Syncytial Virus Infections NIH	0.41
D014777	Virus Diseases NIH	0.12
D007239	Infection NIH	0.06

Correlated HPO Terms (0)

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	Name (Synonyms)	Correlation

Primary Outcomes

Description: The proportion of participants who develop RSV LRTI through Visit Day 28 per the Endpoint Adjudication Committee (EAC) assessment will be reported.

Measure: Proportion of Participants who Develop Respiratory Syncytial Virus (RSV) Lower Respiratory Tract Infection (LRTI)

Time: Up to Day 28

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Secondary Outcomes

Description: The proportion of participants who develop RSV-associated LRTC through Visit Day 28 per the EAC's assessment will be reported.

Measure: Proportion of Participants who Develop RSV-associated Lower Respiratory Tract Complication (LRTC)

Time: Up to Day 28

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Description: An AE is any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship.

Measure: Number of Participants with Adverse Events (AEs)

Time: Up to 49 days

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Description: Percentage of participants with abnormal clinical laboratory findings will be reported.

Measure: Percentage of Participants with Abnormal Clinical Laboratory Findings

Time: Up to 49 days

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Description: Percentage of participants with abnormal ECGs findings will be reported.

Measure: Percentage of Participants with Abnormal Electrocardiograms (ECGs) Findings

Time: Up to 49 days

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Description: Percentage of participants with abnormal vital signs findings will be reported.

Measure: Percentage of Participants with Abnormal Vital Signs Findings

Time: Up to 49 days

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Description: The proportion of participants progressing to respiratory failure (of any cause) requiring mechanical ventilation (invasive or noninvasive) and/or death, in participants who develop RSV LRTI or RSV-associated LRTC per the EAC's assessment will be reported.

Measure: Proportion of Participants Progressing to Respiratory Failure (of any Cause) Requiring Mechanical Ventilation (Invasive or Noninvasive) and/or Death, in Participants who Develop RSV LRTI or RSV-associated LRTC per the EAC's Assessment

Time: Up to 49 days

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Description: Proportion of participants progressing to respiratory failure (of any cause) requiring mechanical ventilation (invasive or noninvasive) and/or death, (all-cause mortality) will be reported.

Measure: Proportion of Participants Progressing to Respiratory Failure (of any Cause) Requiring Mechanical Ventilation (Invasive or Noninvasive) and/or Death, (all-cause Mortality)

Time: Up to 49 days

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Description: Proportion of participants progressing to death (all-cause mortality), in participants who develop RSV LRTI or RSV-associated LRTC per the EAC's assessment will be reported.

Measure: Proportion of Participants Progressing to Death (All-cause Mortality), in Participants who Develop RSV LRTI or RSV-associated LRTC per the EAC's Assessment

Time: Up to 49 days

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Description: Proportion of participants progressing to death (all-cause mortality) will be reported.

Measure: Proportion of Participants Progressing to Death (All-cause Mortality)

Time: Up to 1 year

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Description: Proportion of participants progressing to respiratory failure (of any cause) requiring mechanical ventilation (invasive or noninvasive), in participants who develop RSV LRTI or RSV-associated LRTC per the EAC's assessment will be reported.

Measure: Proportion of Participants Progressing to Respiratory Failure (of any Cause) Requiring Mechanical Ventilation (Invasive or Noninvasive), in Participants who Develop RSV LRTI or RSV-associated LRTC per the EAC's Assessment

Time: Up to 49 days

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Description: Proportion of participants progressing to respiratory failure (of any cause) requiring mechanical ventilation (invasive or noninvasive) will be reported.

Measure: Proportion of Participants Progressing to Respiratory Failure (of any Cause) Requiring Mechanical Ventilation (Invasive or Noninvasive)

Time: Up to 49 days

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Description: Number of supplemental O2 free days will be reported.

Measure: Number of Supplemental Oxygen (O2) Free Days Through Day 28

Time: Through Day 28

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Description: Incidence of supplemental oxygen requirement in participants will be reported.

Measure: Incidence of Supplemental Oxygen Requirement

Time: Up to 28 days

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Description: Duration of supplemental oxygen requirement in participants will be reported.

Measure: Duration of Supplemental Oxygen

Time: Up to 28 days

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Description: Change from baseline in respiratory rate as measured by the investigator during scheduled visits will be reported.

Measure: Change from Baseline in Respiratory Rate

Time: Baseline up to 49 days

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Description: Change from baseline in heart rate as measured by the investigator during scheduled visits will be reported.

Measure: Change from Baseline in Heart Rate

Time: Baseline up to 49 days

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Description: Change from baseline in SpO2 as measured by the investigator during scheduled visits will be reported.

Measure: Change from Baseline in Peripheral Capillary Oxygen Saturation (SpO2)

Time: Baseline up to 49 days

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Description: Change from baseline in body temperature as measured by the investigator during scheduled visits will be reported.

Measure: Change from Baseline in Body Temperature

Time: Baseline up to 49 days

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Description: Proportion of participants hospitalized (of participants who were not hospitalized at baseline) will be reported.

Measure: Proportion of Participants Hospitalized (of Participants who Were not Hospitalized at Baseline)

Time: Up to 1 year

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Description: Proportion of participants re-hospitalized (of participants who were hospitalized at baseline and discharged during the study and of participants who were not hospitalized at baseline, required hospitalization, and were discharged during the study) will be reported.

Measure: Proportion of Participants Re-hospitalized

Time: Up to 1 year

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Description: Total length of hospital stay (time in hospital from first dosing) will be reported.

Measure: Total Length of Hospital Stay

Time: Up to 49 days

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Description: Total time in the ICU (time in ICU from first dosing) will be reported.

Measure: Total Time in the Intensive Care Unit (ICU)

Time: Up to 49 days

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Description: Incidence of Grade 3 and Grade 4 AEs will be assessed by system organ class where Grade 3: Severe and Grade 4: Life-threatening.

Measure: Incidence of Grade 3 and Grade 4 Adverse Events (AEs)

Time: Up to 49 days

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Description: Incidence of respiratory AEs will be reported.

Measure: Incidence of Respiratory AEs

Time: Up to 49 days

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Description: Incidence of thoracic-related AEs will be reported.

Measure: Incidence of Thoracic-related AEs

Time: Up to 49 days

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Description: Incidence of antibiotic use in participants who develop and in those who do not develop RSV LRTI or RSV-associated LRTC per the EAC's assessment will be reported.

Measure: Incidence of Antibiotic use in Participants who Develop and in Those who do not Develop RSV LRTI or RSV-Associated LRTC per the EAC's Assessment

Time: Up to 49 days

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Description: Time to resolution of symptoms, assessed through an instrument for participant-reported symptoms (RiiQ Symptom Scale) will be reported.

Measure: Time to Resolution of Symptoms as Assessed by Respiratory Infection Intensity and Impact Questionnaire (RiiQ) Symptom Scale

Time: Up to 49 days

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Description: Change from baseline in severity of symptoms reported by participants in the RiiQ symptom scale through Day 28 will be reported.

Measure: Change from Baseline in Severity of Symptoms Reported by Participants in the RiiQ Symptom Scale Through Day 28

Time: Baseline up to Day 28

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Description: Time to resolution of respiratory illness, through the PGI-S Scale, will be reported.

Measure: Time to Resolution of Respiratory Illness as Assessed by Patient Global Impression of Severity (PGI-S) Scale

Time: Up to 49 days

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Description: Change from baseline in PGI-H scale through Day 28 will be reported.

Measure: Change from Baseline in Patient Global Impression of Health (PGI-H) Scale Through Day 28

Time: Baseline up to Day 28

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Description: Change from baseline in PGI-C scale through Day 28 will be reported.

Measure: Change from Baseline in Patient Global Impression of Change (PGI-C) Scale Through Day 28

Time: Baseline up to Day 28

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Description: AUC (0-24h) is defined as area under the plasma concentration-time curve from time 0 to 24 hours postdose.

Measure: Area Under the Plasma Concentration-time Curve from Time Zero to 24 Hours Postdose (AUC [0-24]) of JNJ-53718678

Time: Up to 24 hours postdose (on Days 1 and 8)

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Description: Ctrough is defined as the observed plasma concentration before dosing or at the end of the dosing interval.

Measure: Trough Plasma Concentration (Ctrough) of JNJ-53718678

Time: Predose on Days 1 and 8

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Description: Cmax is defined as the maximum observed plasma concentration of JNJ-53718678 in the dosing interval.

Measure: Maximum Observed Plasma Concentration (Cmax) of JNJ-53718678

Time: Day 1

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Description: The potential association of plasma concentration-time data of JNJ-53718678 with antiviral activity (RSV viral kinetics) will be analyzed. Association will be analyzed using (non)-linear mixed-effects models in a tabular and/or graphical display.

Measure: Association of Plasma Concentration-time Data of JNJ-53718678 and Antiviral Activity

Time: Up to 49 days

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Description: The potential association of plasma concentration-time data of JNJ-53718678 with selected safety (including AEs and laboratory abnormalities) parameters will be analyzed. Association will be analyzed using (non)-linear mixed-effects models in a tabular and/or graphical display.

Measure: Association of Plasma Concentration-time Data of JNJ-53718678 and Safety Parameters

Time: Up to 49 days

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Description: The potential association of plasma concentration-time data of JNJ-53718678 with clinical outcomes (proportion of participants developing LRTI) will be analyzed. Association will be analyzed using (non)-linear mixed-effects models in a tabular and/or graphical display.

Measure: Association of Plasma Concentration-time Data of JNJ-53718678 and Clinical Outcomes

Time: Up to 49 days

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Description: RSV viral load and change from baseline over time will be measured by quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay in the mid-turbinate nasal swab specimens.

Measure: RSV Viral Load and Change from Baseline Over Time

Time: Baseline up to Day 28

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Description: RSV viral load AUC will be determined by quantitative qRT-PCR assay of nasal swabs.

Measure: RSV Viral Load AUC from Immediately Prior to First Dose of Study Drug (Baseline) Through Days 8, 11, 15, 22 and 28

Time: Baseline up to Days 8, 11, 15, 22 and 28

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Description: Time to undetectable RSV viral load (per the detection limit of the assay used in the study) will be reported.

Measure: Time to Undetectable RSV Viral Load

Time: Up to 49 days

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Description: Proportion of participants with undetectable RSV viral load at each time point throughout the study will be reported.

Measure: Proportion of Participants with Undetectable RSV Viral Load at Each Timepoint

Time: Up to 49 days

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Description: Change from baseline for the HRQOL assessment as assessed through the EQ-5D-5L through Day 28 will be reported.

Measure: Change from Baseline for the Health-related Quality of Life (HRQOL) as Assessed by 5-level EuroQol 5-Dimension (EQ-5D-5L) Through Day 28

Time: Baseline up to Day 28

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Description: Change from baseline for the HRQOL assessment as assessed through RiiQ impact scales through Day 28 will be reported.

Measure: Change from Baseline for the HRQOL as Assessed by RiiQ Impact Scales Through Day 28

Time: Baseline up to Day 28

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Description: Change from baseline in the RSV F gene sequence will be reported.

Measure: Change from Baseline in the RSV F Gene Sequence

Time: Baseline up to 49 days

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