E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
respiratory syncytial virus (RSV) infection |
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E.1.1.1 | Medical condition in easily understood language |
respiratory syncytial virus (RSV) infection |
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E.1.1.2 | Therapeutic area | Diseases [C] - Virus Diseases [C02] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 21.1 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10061603 |
E.1.2 | Term | Respiratory syncytial virus infection |
E.1.2 | System Organ Class | 10021881 - Infections and infestations |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
- To assess the efficacy of nirsevimab in preventing RSV LRTI hospitalization compared to no intervention |
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E.2.2 | Secondary objectives of the trial |
• Assess efficacy of nirsevimab in preventing very severe RSV LRTI and hospitalizations for all cause LRTI • Assess efficacy of nirsevimab in preventing RSV LRTI hospitalization in each country • Assess efficacy of nirsevimab in preventing RSV LRTI, very severe RSV LRTI and hospitalizations for all-cause LRTI hospitalization through 150 days post-dosing/randomization • Further characterize the safety profile of nirsevimab • Assess efficacy of nirsevimab in preventing RSV LRTI hospitalization and hospitalizations for allcause LRTI through 180 days postdosing/randomization • Assess incidence of RSV LRTI hospitalization and hospitalizations for all-cause LRTI from 181 days post- dosing/randomization until D366 • Describe in each study group incidence of RSV LRTI hospitalization and all-cause LRTI hospitalization in UK reconsented participants from D366 to D731 • Assess incidence of recurrent wheeze in UK reconsented participants from D01 to D731 |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
- Born at ≥ 29 weeks gestational age and aged 0 to 12 months (calendar age) who are entering their first RSV season on the day of inclusion in the study (D01) - Informed consent form has been signed and dated by the parent(s) or other LAR(s) (and by an independent witness if required by local regulations) - Participant and parent/LAR are able to attend the scheduled visit and to comply with all study procedures
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E.4 | Principal exclusion criteria |
Participants are not eligible for the study if any of the following criteria are met: - Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the preceding 6 months; or long-term systemic corticosteroid therapy (prednisone or equivalent for more than 2 consecutive weeks within the past 3 months)
- Active confirmed RSV infection at the time of dosing/randomization
- Active LRTI at the time of dosing/randomization
- Known systemic hypersensitivity to any of the study intervention components, or history of a life-threatening reaction to the study intervention used in the study or to a product containing any of the same substances
- Laboratory confirmed thrombocytopenia, or known thrombocytopenia, as reported by the parent/LAR, contraindicating intramuscular injection
- Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating intramuscular injection
- Any condition that, in the opinion of the investigator, is at a stage where it might interfere with study conduct or completion
- Moderate or severe acute illness/infection (according to investigator judgment) or febrile illness (temperature ≥ 38.0°C [≥ 100.4°F]) on the day of study intervention administration. A prospective participant should not be included in the study until the condition has resolved or the febrile event has subsided
- Mother of the infant participant was administered an RSV vaccine during her pregnancy with the infant participant
- Receipt of any monoclonal antibody by the infant participant
- Receipt of immune globulins, blood or blood-derived products in the past 3 months by the infant participant
- Participation at the time of study enrollment or planned participation during the present study period in another clinical study investigating a vaccine, drug, medical device, or medical procedure
- Eligible to receive palivizumab at time of inclusion (as per local guidelines)
- In an emergency setting or hospitalized involuntarily
- Identified as a natural or adopted child of the Investigator or employee with direct involvement in the proposed study |
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E.5 End points |
E.5.1 | Primary end point(s) |
Overall incidence of RSV LRTI hospitalization through the RSV season: Number of RSV LRTI hospitalization through the RSV season.
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
Up to 180 days post-dosing/randomization
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E.5.2 | Secondary end point(s) |
1/ Incidence of very severe RSV LRTI through the RSV season: Number of very severe RSV LRTI through the RSV season. Severe RSV LRTI are defined as confirmed RSV hospitalization for LRTI with an oxygen saturation (SaO2) < 90% (at any time) and oxygen supplementation.
2/ Incidence of hospitalization for LRTI through the RSV season in each country: Number of RSV LRTI hospitalization in each country through the RSV season.
3/ Overall hospitalization for all cause LRTI in all 3 countries combined throughout the RSV season: Number of RSV LRTI hospitalization in all 3 countries combined through the RSV season.
4/ Incidence (overall and in each country) of RSV LRTI hospitalization throughout 150 days post-dosing/randomization: Number of RSV LRTI hospitalization, overall and in each country, throughout 150 days post-dosing/randomization.
5/ Incidence of very severe RSV LRTI in all 3 countries combined through 150 days post-dosing/randomization: Number of very severe RSV LRTI in all 3 countries combined through 151 days post-dosing/randomization. Severe RSV LRTI are defined as confirmed RSV hospitalization for LRTI with an oxygen saturation (SaO2) < 90% (at any time) and oxygen supplementation.
6/ Incidence of hospitalizations for all cause LRTI through 150 days post-dosing/randomization 7/ Incidence of RSV LRTI hospitalization throughout the second year post-immunization/randomization 8/Incidence of hospitalizations for all-cause LRTI throughout the second year post immunization/randomization 9/ Any immediate adverse events (AEs) reported in the 30.minutes after immunization 10/ Non-serious AEs from D01 (post-dosing/randomization) to D31 11/ Adverse events of special interest (AESIs) from D01 visit through 1- year post-dosing/randomization or D366 12/ Medically attended adverse events (MAAEs) from D01 visit through 1-year post-dosing/randomization or D366 13/ Serious adverse events (SAEs) from D01 visit through 1-year post dosing/randomization or D366 14/ Related SAEs from D366 to D731 for United Kingdom (UK) participants 15/ Incidence of RSV LRTI hospitalizations through 180 days post dosing/randomization (overall and in each country) 16/ Incidence of hospitalizations for all cause LRTI through 180 days post-dosing/randomization 17/ Incidence of RSV LRTI hospitalization from 181 days post dosing/randomization until D366 the end of the study (overall and in each country) 18/ Incidence of hospitalizations for all cause LRTI from 181 days post dosing/randomization until D366 19/Incidence of recurrent wheeze in UK reconsented participants from D01 to D731 |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
1/ to 3/: Up to 180 days post-dosing/randomization
4/, 5/, 6/: Day 151
7/, 8/, 14/ : Day 366 to Day 731 9/ : 30 minutes after immunization 10/ : Day 01 to Day 31 11/, 12/, 13/ : Day 01 through 1-year post-dosing/randomization (Day 366) 15/, 16/ : Day 01 through 180 days post-dosing/randomization 17/, 18/ : 181 days post-dosing/randomization until Day 366 19/ : Day 01 to Day 731 |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | Yes |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | Yes |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | Yes |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | Yes |
E.8.1.7.1 | Other trial design description |
In-person visit at D01, 12-month call for all, 18 and 24-month call for UK reconsented participants. |
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E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | Yes |
E.8.2.3.1 | Comparator description |
1 arm is with no treatment |
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E.8.2.4 | Number of treatment arms in the trial | 2 |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.4.1 | Number of sites anticipated in Member State concerned | 49 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 300 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | Yes |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned |
United Kingdom |
France |
Germany |
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E.8.7 | Trial has a data monitoring committee | No |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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LPLV (phone call) participant is considered to have completed the study if the parents or legally acceptable representatives (LARs) have completed the last contact planned in the schedule of activities (SoA) (telephone contact at D366 for France, and Germany and UK non reconsented participants and telephone contact at D731 for UK reconsented participants). The end of the study is defined as the date of the last contact of the last participant in the study |
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 2 |
E.8.9.1 | In the Member State concerned months | 7 |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 2 |
E.8.9.2 | In all countries concerned by the trial months | 7 |