This study is an extension to the completed first-in-human C1091001 study (NCT03170609) and is to evaluate the safety and immunogenicity of a single booster vaccine dose of GBS6, administered approximately 2 years or more after a primary GBS6 dose, to healthy adult males and nonpregnant women. The study will determine whether individuals who received a primary dose of GBS6 have additional benefit following a booster dose.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
151
2 formulations at 1 dose level
Clinical Research Atlanta
Stockbridge, Georgia, United States
Kentucky Pediatric & Adult Research Inc.
Bardstown, Kentucky, United States
J. Lewis Research, Inc./ Foothill Family Clinic South
Salt Lake City, Utah, United States
J. Lewis Research, Inc. / Foothill Family Clinic South
Salt Lake City, Utah, United States
Percentage of Participants Reporting Prompted Local Reactions Within 14 Days Following Booster Dose (Redness, Swelling, and Pain at the Injection Site)
Local reactions were collected by using an e-diary and included pain at injection site, redness, and swelling graded below: pain at injection site: mild (did not interfere with activity), moderate (repeated use of nonnarcotic pain reliever \>24 hours or interfered with activity), severe (any use of narcotic pain reliever or prevented daily activity), grade 4 (emergency room visit or hospitalization). Redness and swelling were graded as: mild (2.0-5.0 centimeter \[cm\]), moderate (greater than \[\>\] 5.0-10.0 cm),severe (\>10.0 cm), grade 4 for redness (necrosis or exfoliative dermatitis) and grade 4 for swelling (necrosis).Maximum severity (highest grading) of each location reaction within 14 days of vaccination was derived.
Time frame: Within 14 days after booster dose
Percentage of Participants Reporting Prompted Systemic Events Within 14 Days Following Booster Dose (Fever, Nausea/Vomiting, Diarrhea, Headache, Fatigue, Muscle Pain, and Joint Pain)
Nausea/Vomiting:Mild:No interference with activity or 1-2 times in 24 hours;Moderate:Some interference with activity or\>2 times in 24 hours;Severe:Prevented daily activity, required IV hydration.Diarrhea:Mild:2-3 loose stools in 24 hours;Moderate: 4-5 loose stools in 24 hours;Severe:\>=6 loose stools in 24 hours.Headache:Mild:No interference with activity;Moderate:Repeated use of nonnarcotic pain reliever \>24 hours or some interference with activity;Severe:Significant; any use of narcotic pain reliever or prevents daily activity.Fatigue:Mild:No interference with activity;Moderate: Some interference with activity;Severe: Significant; prevented daily activity.Muscle pain:Mild: No interference with activity;Moderate:Some interference with activity;Severe:Significant;prevented daily activity.Muscle/joint pain:Mild: No interference with activity;Moderate:Some interference with activity;Severe:Significant; prevented daily activity.Grade 4 for all AEs:Emergency visit or hospitalization.
Time frame: Within 14 days after booster dose
Percentage of Participants Reporting Adverse Events (AEs) Within 1 Month Following Booster Dose
An AE was any untoward medical occurrence in a participant who received investigational product without regard to possibility of causal relationship. Serious adverse event (SAE) was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly or that was considered to be an important medical event. AEs included both non-serious AEs and SAEs.
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Time frame: Within 1 month after booster dose
Percentage of Participants Reporting Medically Attended Adverse Events (MAEs) Within 6 Months Following Booster Dose
An AE was any untoward medical occurrence in a participant in a participant who received investigational product without regard to possibility of causal relationship. SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly or that was considered to be an important medical event. An MAE was defined as a non serious AE (AE other than SAE) that resulted in an evaluation at a medical facility.
Time frame: Within 6 months after booster dose
Percentage of Participants With Serious Adverse Events (SAEs) Within 6 Months After Booster Dose
An AE was any untoward medical occurrence in a participant in a participant who received investigational product without regard to possibility of causal relationship. SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly or that was considered to be an important medical event.
Time frame: Within 6 months after booster dose
GBS Serotype-Specific IgG Geometric Mean Concentrations (GMC) Measured Before and 1 Month After Booster Dose
Serotypes used for evaluation were: Ia, Ib, II, III, IV, and V.
Time frame: Before and 1 month after booster dose
GBS Serotype-Specific Opsonophagocytic Activity (OPA) Geometric Mean Titers Measured Before to 1 Month After Booster Dose
OPA for the 6 serotypes (Ia, Ib, II, III, IV, V) were determined in all participants for each blood sample at Day 1 and at 1 month after booster dose.
Time frame: Within 6 months after primary dose and within 1 month after booster dose
GBS Serotype-Specific IgG Geometric Mean Fold Rise (GMFR) From Before To 1 Month After Booster Dose
IgG for the 6 serotypes (Ia, Ib, II, III, IV, V) were determined in all participants for each blood sample at Day 1 and at 1 month after booster dose.
Time frame: 1 month after booster dose
GBS Serotype-Specific OPA GMFR Measured Before and 1 Month After Booster Dose
OPA for the 6 serotypes (Ia, Ib, II, III, IV, V) were determined in all participants for each blood sample at Day 1 and at 1 month after booster dose.
Time frame: 1 month after booster dose
GBS Serotype-Specific IgG GMC Measured 1 Month After Booster Dose Stratified by Baseline Pre-vaccination Status (Before the Primary Dose)
Serotypes used for evaluation were: Ia, Ib, II, III, IV, and V. The pre-vaccination immunogenicity blood draw and booster vaccination were both performed on Day 1.
Time frame: 1 month after booster dose