The purpose of this study is to assess the safety, reactogenicity and immune responses of two doses of the investigational RSV vaccines (with different formulations), when administered intramuscularly (IM) according to a 0, 2 month schedule, in older adults aged 60 to 80 years. As the investigational vaccines have not yet been tested in humans before, the study will first assess the safety, reactogenicity and immune responses in young adults aged 18 to 40 years. The study will thus be conducted in 2 parts (Part A and Part B).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
TRIPLE
Enrollment
1,053
Two doses administered intramuscularly at Days 1 and 61 in the deltoid region of the arm
Two doses administered intramuscularly at Days 1 and 61 in the deltoid region of the arm.
Two doses administered intramuscularly at Days 1 and 61 in the deltoid region of the arm
Two doses administered intramuscularly at Days 1 and 61 in the deltoid region of the arm.
Two doses administered intramuscularly at Days 1 and 61 in the deltoid region of the arm.
Two doses administered intramuscularly at Days 1 and 61 in the deltoid region of the arm.
Two doses administered intramuscularly at Days 1 and 61 in the deltoid region of the arm.
Two doses administered intramuscularly at Days 1 and 61 in the deltoid region of the arm
Two doses administered intramuscularly at Days 1 and 61 in the deltoid region of the arm.
Two doses administered intramuscularly at Days 1 and 61 in the deltoid region of the arm.
GSK Investigational Site
Jacksonville, Florida, United States
GSK Investigational Site
Miami, Florida, United States
GSK Investigational Site
Stockbridge, Georgia, United States
GSK Investigational Site
Lenexa, Kansas, United States
GSK Investigational Site
Wichita, Kansas, United States
GSK Investigational Site
Elkridge, Maryland, United States
GSK Investigational Site
Kansas City, Missouri, United States
GSK Investigational Site
Omaha, Nebraska, United States
GSK Investigational Site
Rochester, New York, United States
GSK Investigational Site
Hickory, North Carolina, United States
...and 11 more locations
Number of Subjects With Any Solicited Local Symptoms After First Vaccination Dose
Assessed solicited local AEs at injection site are pain, erythema and swelling. Any erythema/swelling was scored as injection site erythema/swelling with a diameter larger than (\>) 20 millimeters (mm)
Time frame: During a 7-day follow-up period after first vaccination dose (i.e., on the day of vaccination [at Day 1] and 6 subsequent days)
Number of Subjects With Any Solicited Local Symptoms After Second Vaccination Dose
Assessed solicited local AEs at injection site are pain, erythema and swelling. Any erythema/swelling was scored as injection site erythema/swelling with a diameter larger than (\>) 20 millimeters (mm)
Time frame: During a 7-day follow-up period after second vaccination dose (i.e., on the day of vaccination [at Day 61] and 6 subsequent days)
Number of Subjects With Any Solicited General Symptom After First Vaccination Dose
Assessed solicited general symptoms include arthralgia, fatigue, fever \[defined as temperature equal to or above 38.0 degrees Celsius (°C)\], gastrointestinal symptoms \[nausea, vomiting, diarrhea and/or abdominal pain\], headache, myalgia and shivering.
Time frame: During a 7-day follow-up period after the first vaccination dose (i.e., on the day of vaccination [at Day 1] and 6 subsequent days)
Number of Subjects With Any Solicited General Symptom After Second Vaccination Dose
Assessed solicited general symptoms include arthralgia, fatigue, fever \[defined as temperature equal to or above 38.0 degrees Celsius (°C)\], gastrointestinal symptoms \[nausea, vomiting, diarrhea and/or abdominal pain\], headache, myalgia and shivering.
Time frame: During a 7-day follow-up period after the second vaccination dose (i.e., on the day of vaccination [at Day 61] and 6 subsequent days)
Number of Subjects With Any Unsolicited Adverse Events (AEs) After Any Vaccination Dose
An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and/or any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any is defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination.
Time frame: During a 30-day follow-up period (i.e., on the day of vaccination and 29 subsequent days) after any vaccination dose (across doses)
Number of Subjects Presenting Change From Baseline in Hematology and Biochemistry With Respect of Normal Laboratory Ranges, After First Vaccine Dose (Part A Groups)
Assessed hematological laboratory parameters include basophils, eosinophils, erythrocytes, hemoglobin, lymphocytes, monocytes, neutrophils, platelets, white blood cells. Biochemical laboratory parameters include alanine aminotransferase \[ALT\], aspartate aminotransferase \[AST\], creatinine, urea nitrogen and uric acid. Categories reported when comparing Day 1 (pre-vaccination dose 1=baseline) and Day 8 hematological and biochemical laboratory results are defined as follows: \<parameter\>-\<range at baseline\>-\<range at timing\> (e.g. ALT-Within-Within). Ranges level being classified as unknown, below, within or above the normal ranges.
Time frame: At baseline and at 7 days after the first vaccine dose (Day 8)
Number of Subjects Presenting Change From Baseline in Hematology and Biochemistry With Respect of Normal Laboratory Ranges, After First Vaccine Dose (Part B Groups)
Assessed hematological laboratory parameters include basophils, eosinophils, erythrocytes, hemoglobin, lymphocytes, monocytes, neutrophils, platelets, white blood cells. Biochemical laboratory parameters include alanine aminotransferase \[ALT\], aspartate aminotransferase \[AST\], creatinine, urea nitrogen and uric acid. Categories reported when comparing Day 1 (pre-vaccination dose 1=baseline) and Day 8 hematological and biochemical laboratory results are defined as follows: \<parameter\>-\<range at baseline\>-\<range at timing\> (e.g. ALT-Within-Within). Ranges level being classified as unknown, below, within or above the normal ranges.
Time frame: At baseline and at 7 days after the first vaccine dose (Day 8)
Number of Subjects Presenting Change From Baseline in Hematology and Biochemistry With Respect of Normal Laboratory Ranges, After Second Vaccine Dose (Part A Groups)
Assessed hematological laboratory parameters include basophils, eosinophils, erythrocytes, hemoglobin, lymphocytes, monocytes, neutrophils, platelets, white blood cells. Biochemical laboratory parameters include alanine aminotransferase \[ALT\], aspartate aminotransferase \[AST\], creatinine, urea nitrogen and uric acid. Categories reported when comparing Day 61 (pre-vaccination dose 2=baseline) and Day 68 hematological and biochemical laboratory results are defined as follows: \<parameter\>-\<range at baseline\>-\<range at timing\> (e.g. ALT-Within-Within). Ranges level being classified as unknown, below, within or above the normal ranges.
Time frame: At baseline and at 7 days after the second vaccine dose (Day 68)
Number of Subjects Presenting Change From Baseline in Hematology and Biochemistry With Respect of Normal Laboratory Ranges, After Second Vaccine Dose (Part B Groups)
Assessed hematological laboratory parameters include basophils, eosinophils, erythrocytes, hemoglobin, lymphocytes, monocytes, neutrophils, platelets, white blood cells. Biochemical laboratory parameters include alanine aminotransferase \[ALT\], aspartate aminotransferase \[AST\], creatinine, urea nitrogen and uric acid. Categories reported when comparing Day 61 (pre-vaccination dose 2=baseline) and Day 68 hematological and biochemical laboratory results are defined as follows: \<parameter\>-\<range at baseline\>-\<range at timing\> (e.g. ALT-Within-Within). Ranges level being classified as unknown, below, within or above the normal ranges.
Time frame: At baseline and at 7 days after the second vaccine dose (Day 68)
Number of Subjects With Any Grade 3 Non-serious AEs (Solicited and Unsolicited) After First Dose of Vaccination
A Grade 3 AE is any AE assessed as severe, i.e. which prevents normal, everyday activities. In adults, such an AE would, for example, prevent attendance at work and would necessitate the administration of corrective therapy.
Time frame: During a 30-day follow-up period (i.e., on the day of vaccination at Day 1, and 29 subsequent days) after first dose of vaccination
Number of Subjects With Any Grade 3 Non-serious AEs (Solicited and Unsolicited) After Second Dose of Vaccination
A Grade 3 AE is any AE assessed as severe, i.e. which prevents normal, everyday activities. In adults, such an AE would, for example, prevent attendance at work and would necessitate the administration of corrective therapy.
Time frame: During a 30-day follow-up period (i.e., on the day of vaccination at Day 61, and 29 subsequent days) after second dose of vaccination
Number of Subjects With Any Serious Adverse Events (SAEs) up to 30 Days After the Second Vaccination
A SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization or results in disability/incapacity.
Time frame: From first vaccination (Day 1) up to 30 days post second vaccination (Day 91)
Number of Subjects With Any Potential Immune-mediated Diseases (pIMDs) up to 30 Days After the Second Vaccination (Part B Groups)
pIMDs are a subset of AEs that include autoimmune diseases and other inflammatory and/or neurologic disorders of interest which may or may not have an autoimmune etiology.
Time frame: From first vaccination (Day 1) up to 30 days post second vaccination (Day 91)
Number of Subjects With Any SAEs, up the End of Follow-up Period (Month 14) - Part B Groups
A SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization or results in disability/incapacity or is a congenital anomaly/birth defect in the offspring of a study subject.
Time frame: From Day 1 up to the end of follow-up period (Month 14)
Number of Subjects Reporting pIMDs up to the End of Follow-up Period (Month 14) - Part B Groups
pIMDs are a subset of AEs that include autoimmune diseases and other inflammatory and/or neurologic disorders of interest which may or may not have an autoimmune etiology.
Time frame: From Day 1 up to the end of follow-up period (Month 14)
Number of Subjects With at Least One RSV-confirmed Respiratory Tract Infection (RTI) Episode Post-vaccination Reported During RTI Surveillance - Part B Groups
The number of subjects with at least one RTI case was provided by group. Reported categories are RSV+ (= RTI episode tested as RSV positive by quantitative reverse transcription polymerase chain reaction (qRT-PCR) on nasal/throat swab) and RSV- (= RTI episode tested as RSV negative by qRT-PCR on nasal/throat swab).
Time frame: During the RSV season (from October 2019 to March 2020)
Humoral Immune Response With Respect to Components of the Investigational Vaccine in Terms of Neutralizing Antibody Titers Against RSV-serotype A
Serological assays for the determination of functional antibodies against RSV-A were performed by neutralization assay. Anti RSV-A neutralizing antibody titers are given as geometric mean titers (GMTs) and expressed as Estimated Dose: serum dilution giving a 60% reduction of the signal compared to a control without serum (ED60).
Time frame: At pre-vaccination (Day 1), 30 days post-Dose 1 (Day 31), on the day of second vaccination (Day 61) and 30 days post-Dose 2 (Day 91)
Humoral Immune Response With Respect to Components of the Investigational Vaccine in Terms of RSVPreF3-specific Immunoglobulin G (IgG) Antibody Concentrations
The detection and the quantification of total IgG antibodies directed against RSVPreF3 in human serum samples were based on an indirect enzyme-linked immunosorbent assay (ELISA). Anti RSVPreF3 antibody concentration is given in geometric mean concentration (GMC) and is expressed in ELISA Laboratory Units per milliliter (ELU/mL).
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Time frame: At pre-vaccination (Day 1), 30 days post-Dose 1 (Day 31), on the day of second vaccination (Day 61) and 30 days post-Dose 2 (Day 91)
Descriptive Statistics of the Frequency of RSVPreF3 Specific Cluster of Differentiation 4+ (CD4+) T Cells Expressing at Least 2 Markers
Among markers expressed were interleukin-2 (IL2), cluster of 40 ligand (CD40L), tumor necrosis factor alpha (TNF α) and interferon gamma (IFN γ), in vitro upon stimulation with RSVPreF3 peptide preparations. Reported statistics at each time point during which blood sample were collected for cell-mediated immunity, are geometric mean and inter-quartile range.
Time frame: At pre-vaccination (Day 1), 30 days post-Dose 1 (Day 31), on the day of second vaccination (Day 61) and 30 days post-Dose 2 (Day 91)