Maternal RSV Immunization Clinical Landscape Report 2026: Trials, Readouts and White Space
Turn fragmented clinical intelligence into a decision-ready landscape. This report was assembled with PatSnap MCP Servers for Clinical Trials, Drug & Asset, and Company & Deal Intelligence. Explore the PatSnap MCP Marketplace to reproduce the workflow in your own AI research stack.
Data snapshot: 16 July 2026. This report is a strategic research view, not medical advice. Trial status and timing can change; confirm records before making development or investment decisions.
Executive view
Maternal RSV Immunization remains an active clinical development field. The strongest programs are pairing biologically differentiated interventions with patient-centered outcomes, less burdensome delivery and longer evidence windows. The PatSnap evidence set used here contains 213 matched trial records and 229 indexed result records before the decision-focused sample below was selected.
How PatSnap MCP built this report
The workflow used Clinical Trials MCP search to define the landscape, then clinical_trial_fetch to retrieve trial design, phase, status, sponsor, geography, endpoints and timing. It separately called clinical_trial_result_fetch for indexed readouts. Drug & Asset drug_fetch supplied target and global development status, while Company & Deal Intelligence organization_fetch supplied sponsor context. This keeps trial-, asset- and company-level claims distinct and traceable.
Trial landscape table
| Trial | Asset / intervention | Phase / status | Sponsor | Geography | Primary endpoint | Expected readout |
|---|---|---|---|---|---|---|
| NCT07700134 | Intervention not normalized | Not Applicable; Active, not recruiting | National & Kapodistrian University of Athens | Greece | Mitochondrial Mass in T-lymphocytes (Within 12 hours upon childs admission) | 2028-12-01 |
| NCT07698769 | Intervention not normalized | Not Applicable; Recruiting | Centre Hospitalier Intercommunal Créteil | France | Mucosal cytokine profile of patients (type I and III interferons, pro-inflammatory cytokines) (Baseline) | 2026-12-05 |
| NCT07694557 | YKYY025 | Phase 1; Not yet recruiting | Sponsor not listed | China | Adverse events(AEs） (within 30 days after vaccination); Serious adverse events (SAEs) (within 12 months after vaccination) | 2028-07-01 |
| NCT07693166 | RSVpreF | Phase 4; Not yet recruiting | University of British Columbia | Geography not listed | Immunogenicity (Within 10 weeks); Transplacental Antibody (8-10 weeks) | 2027-09-01 |
The table is designed for competitive decisions: endpoint selection, geographic reach and readout timing appear beside phase and sponsor. Phase alone does not reveal evidence maturity; a small study may answer a near-term biomarker question while a large pivotal program can leave a multi-year readout gap.
What indexed results say
- Randomized, placebo-controlled phase 3 trial evaluating safety, immunogenicity, and reactogenicity of RSVPreF3-Mat in high-risk pregnant women and their infants (Phase 3): the indexed record reports -; Anti-RSVPreF3-Mat immunoglobulin G (IgG)(14.12-fold increase over pre-vaccination) = 14.12 fold.
- Coadministration of mRNA-1345 RSV vaccine with high-dose quadrivalent influenza vaccine in adults aged 65 and older: An observer-blinded, placebo-controlled, randomized, phase 3 trial. (Phase 3): the indexed record reports death = no deaths.
- A PHASE 3, RANDOMIZED, DOUBLE-BLINDED, PLACEBO-CONTROLLED TRIAL TO EVALUATE THE SAFETY, TOLERABILITY, AND IMMUNOGENICITY OF RESPIRATORY SYNCYTIAL VIRUS (RSV) PREFUSION F SUBUNIT VACCINE IN PREGNANT PARTICIPANTS LIVING WITH HIV AND THEIR INFANTS (Phase 3): the indexed record reports Redness: Any = 1.8 Percentage of participants (95% Confidence Interval, 0.4 - 5.2); -; -.
Cross-trial comparisons require caution. Population, prior therapy, baseline risk, endpoint definition, follow-up and analysis set can all change the apparent signal. The strategic value lies in identifying what each readout resolves—and which uncertainty remains.
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Asset and sponsor context
PatSnap Drug & Asset records add mechanism and global development status for the sampled programs, including YKYY025 (Phase 1; RSV F protein), RSVpreF (Approved; RSV F protein). Company & Deal Intelligence records identify sponsor context for National & Kapodistrian University of Athens, Centre Hospitalier Intercommunal Créteil, University of British Columbia. Together, those layers show whether a study sits inside a scaled portfolio, an emerging specialist strategy or an academic development path.
Where the white space is
- Endpoints that capture daily function and treatment burden alongside biological change.
- Long-duration comparisons against current procedural or pharmacologic standards.
- Evidence across diverse ages, disease stages and reproductive contexts.
- Delivery approaches that improve persistence without sacrificing safety.
Strategic implications
For sponsors, differentiation is more credible when the evidence package resolves a known decision gap: an active comparator, a better-defined responder population, a safer or easier delivery model, a clinically meaningful outcome, or a defensible sequencing strategy. Business-development teams can use the same landscape to separate crowded mechanisms from differentiated evidence architectures. Investors should track endpoint maturity and operational feasibility alongside nominal phase.
What to monitor next
Track status changes, protocol amendments, primary-completion dates, newly indexed results, ownership changes and multinational expansion. Re-run the MCP queries on a schedule and compare deltas. Pay particular attention when a program moves from a surrogate endpoint to a clinical outcome or when a specialist sponsor adds a scaled development partner.
Bottom line
Maternal RSV Immunization has meaningful clinical activity and equally meaningful evidence gaps. A useful landscape connects trial design, results, mechanism and sponsor rather than listing studies in isolation.
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