Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Panel A: Peak Viral Load (PVL) Based on Viral Quantitative Culture |
PVL is the maximum viral load determined by viral quantitative culture (plaque assay). |
From Day 2 up to Day 12 |
|
Primary |
Panel B: Area Under the Viral Load-time Curve (VL-AUC) Determined by Viral Quantitative Culture |
VL-AUC is determined by viral quantitative culture (plaque assay). |
Twice daily from Day -1 to Day 11; once on Day 12 |
|
Secondary |
Panels A & B: Number of participants experiencing =1 adverse event (AE) |
An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. |
From Day -1 up to Day 28 |
|
Secondary |
Panels A & B: Number of participants experiencing =1 serious AE (SAE) |
An SAE is any untoward medical occurrence that, at any dose, results in death; is life-threatening; requires hospitalization or prolongs existing hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly or birth defect; or is another important medical event such as invasive/malignant cancers or substance abuse/dependency. |
From Day -1 up to Day 28 |
|
Secondary |
Panels A & B: Number of participants experiencing =1 viral challenge-related AE |
An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. |
From Day 0 up to Day 28 |
|
Secondary |
Panels A & B: Number of participants experiencing =1 viral challenge-related SAE |
An SAE is any untoward medical occurrence that, at any dose, results in death; is life-threatening; requires hospitalization or prolongs existing hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly or birth defect; or is another important medical event such as invasive/malignant cancers or substance abuse/dependency. |
From Day 0 up to Day 28 |
|
Secondary |
Panel A: VL-AUC Determined by Viral Quantitative Culture |
VL-AUC is determined by quantitative viral culture (plaque assay). |
Twice daily from Day 2 to Day 11; once on Day 12 |
|
Secondary |
Panel A: VL-AUC Determined by Real-time Quantitative Reverse Transcription Polymerase Chain Reaction (qRT-PCR) |
VL-AUC is determined by qRT-PCR. |
Twice daily from Day 2 to Day 11; once on Day 12 |
|
Secondary |
Panel A: PVL Determined by qRT-PCR |
PVL is determined by maximum viral load defined by qRT-PCR. |
From Day 2 up to Day 12 |
|
Secondary |
Panel A: Area Under the Curve over Time of Total Clinical Symptoms (TSS-AUC) |
TSS-AUC measured from 10 symptoms within the graded symptom scoring will be reported. Participants use a symptom diary card to record the severity of 10 symptoms on a scale ranging from 0 ("absence") to 3 ("bothersome and interferes with activities"). |
Three times daily from Day 2 to Day 11, once on Day 12 |
|
Secondary |
Panel A: Area Under the Curve over Time of Total Clinical Symptoms Change from Baseline (TSS-AUC-CFB) |
TSS-AUC-CFB measured from 10 symptoms within the graded symptom scoring will be reported. Participants use a symptom diary card to record the severity of 10 symptoms on a scale ranging from 0 ("absence") to 3 ("bothersome and interferes with activities"). |
Baseline and three times daily from Day 2 to Day 11, once on Day 12 |
|
Secondary |
Panel A: Peak Total Clinical Symptoms (TSS) |
Peak TSS measured from 10 symptoms within the graded symptom scoring will be reported. Participants use a symptom diary card to record the severity of 10 symptoms on a scale ranging from 0 ("absence") to 3 ("bothersome and interferes with activities"). |
From Day 2 up to Day 12 |
|
Secondary |
Panel A: Peak Daily Symptom Score |
Peak individual daily sum of symptom score measured from 10 symptoms within the graded symptom scoring will be reported. Participants use a symptom diary card to record the severity of 10 symptoms on a scale ranging from 0 ("absence") to 3 ("bothersome and interferes with activities"). |
From Day 2 up to Day 12 |
|
Secondary |
Panel A: Incidence of Respiratory Syncytial Virus (RSV) Infection Based on qRT-PCR |
RSV infection is defined as 2 quantifiable (> LLOQ) qRT-PCR measurements reported on 2 or more days. |
From Day 2 up to Day 12 |
|
Secondary |
Panel A: Incidence of A Nasal Swab Positive Test for RSV |
The incidence of a positive (> LLOQ) cell culture measurement in nasal swab samples. |
From Day 2 up to Day 12 |
|
Secondary |
Panel A: Incidence of RT-PCR Confirmed Symptomatic RSV Infection |
Incidence of symptomatic RSV infection is defined as 2 quantifiable (=LLOQ) qRT-PCR measurements reported on 2 or more days and a symptom of =2 at a single time point. |
From Day 2 up to Day 12 |
|
Secondary |
Panel A: Incidence of RT-PCR Confirmed Moderately Severe Symptomatic RSV Infection |
Incidence of symptomatic RSV infection is defined as 2 quantifiable (=LLOQ) qRT-PCR measurements reported on 2 or more days and any symptoms of grade =2 at a single time point. |
From Day 2 up to Day 12 |
|
Secondary |
Panel A: Incidence of Culture Lab Confirmed Symptomatic RSV Infection |
Incidence of culture lab confirmed RSV infection is defined by 1 quantifiable (=LLOQ) cell culture measurement from Day 2 up to Day 12, and symptom of =2 at a single time point. |
From Day 2 up to Day 12 |
|
Secondary |
Panel B: PVL Determined by Viral Quantitative Culture |
VL-AUC is determined by quantitative viral culture (plaque assay). |
From Day -1 up to Day 12 |
|
Secondary |
Panel B: Time to Negative Test by Viral Quantitative Culture |
The time to a negative test (result < low limit of quantification [LLOQ]) by viral quantitative culture (plaque assay) in days will be reported. |
From Day -1 up to Day 12 |
|
Secondary |
Panel B: VL-AUC Determined by qRT-PCR |
VL-AUC is determined by qRT-PCR. |
Twice daily from Day -1 to Day 11; once on Day 12 |
|
Secondary |
Panel B: PVL Determined by qRT-PCR |
PVL is determined by qRT-PCR. |
From Day -1 up to Day 12 |
|
Secondary |
Panel B: Time to Negative Test by qRT-PCR |
The time in days to a negative test (result < LLOQ) by viral quantitative culture (plaque assay) will be reported. |
From Day -1 up to Day 12 |
|
Secondary |
Panel B: TSS-AUC |
TSS-AUC measured from 10 symptoms within the graded symptom scoring will be reported. Participants use a symptom diary card to record the severity of 10 symptoms on a scale ranging from 0 ("absence") to 3 ("bothersome and interferes with activities"). |
Three times daily from Day 2 to Day 11, once on Day 12 |
|
Secondary |
Panel B: TSS-AUC-CFB |
TSS-AUC-CFB measured from 10 symptoms within the graded symptom scoring will be reported. Participants use a symptom diary card to record the severity of 10 symptoms on a scale ranging from 0 ("absence") to 3 ("bothersome and interferes with activities"). |
Baseline and three times daily from Day 2 to Day 11, once on Day 12 |
|
Secondary |
Panel B: Peak TSS |
Peak TSS measured from 10 symptoms within the graded symptom scoring will be reported. Participants use a symptom diary card to record the severity of 10 symptoms on a scale ranging from 0 ("absence") to 3 ("bothersome and interferes with activities"). |
From Day 2 up to Day 12 |
|
Secondary |
Panel B: Peak Daily Symptom Score |
Peak individual daily sum of symptom score measured from 10 symptoms within the graded symptom scoring will be reported. Participants use a symptom diary card to record the severity of 10 symptoms on a scale ranging from 0 ("absence") to 3 ("bothersome and interferes with activities"). |
From Day 2 up to Day 12 |
|
Secondary |
Panel B: Time to Negative Test by Symptom Resolution |
The time in days to symptom resolution, as measured from 10 symptoms within the graded daily symptom scoring system, will be reported. |
From Day 2 up to Day 12 |
|
Secondary |
Panels A & B: Maximum plasma concentration (Cmax) of N-hydroxycytidine (NHC) |
The Cmax of NHC will be reported. |
Day -1: Predose and 12 hours postdose; Days 2, 5, and 6: 12 hours postdose; Days 4 and 7: predose and 0.5, 1.5, 4, 8, and 12 hours postdose |
|
Secondary |
Panels A & B: Time to maximum plasma concentration (Tmax) of NHC |
The Tmax of NHC will be reported. |
Day -1: Predose and 12 hours postdose; Days 2, 5, and 6: 12 hours postdose; Days 4 and 7: predose and 0.5, 1.5, 4, 8, and 12 hours postdose |
|
Secondary |
Panels A & B: Area uncer the plasma concentration from 0 to 12 hours postdose (AUC0-12) of NHC |
The AUC0-12 of NHC will be reported. |
Day -1: Predose and 12 hours postdose; Days 2, 5,Day 7: predose and 0.5, 1.5, 4, 8, and 12 hours postdose |
|
Secondary |
Panels A & B: Trough concentration (Ctrough) of NHC |
The Ctrough of NHC will be reported. |
Day -1: Predose and 12 hours postdose; Days 2, 5,Day 7: predose and 0.5, 1.5, 4, 8, and 12 hours postdose |
|