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NousEvidenceInvestigational Prophylactic

Influenza in U.S. High-Risk Populations · Systematic Evidence Curation 2016–2026

Corpus · 2026-07-09
§ 223 studies
◈ 1520 endpoints
Investigational Prophylactic lens
Vaccine Intelligence

Vaccine performance & coverage across seasons

VE trends, enhanced formulation compare (HD-QIV vs aQIV vs SD vs RIV4 vs Investigational Prophylactic), coverage vs HP2030 target.

VE 2025–26 (hosp)
27%
95% CI 21–34
HD rVE vs SD
42%
VE in IC
5%
Investigational Prophylactic target
76%
Season-long 24 wks

VE Trends 2016–2026

Overall VE vs age ≥65 VE with 60% HP2030 reference line

Traditional VE oscillates 16–54% by season. Mismatched years drop close to zero.

Coverage vs HP2030 target

Coverage by subgroup and season

Only long-stay nursing home residents exceed HP2030's 70% target. ≥65 sits just under.

Formulation Compare

Head-to-head rVE across enhanced vaccines and Investigational Prophylactic

HD-QIV vs SD
≥65 hosp
24.0%
(18–30)
HD-QIV vs SD
NH mortality
42.0%
(30–54)
aQIV vs SD
≥65 hosp
8.0%
(-2–17)
aQIV vs HD
≥65 hosp
3.1%
(-3–9)
RIV4 vs SD
Adults >50 outpatient
30.0%
(10–47)
Cell vs SD
Adults ≥18 outpatient
10.0%
(-5–22)
Investigational Prophylactic vs Placebo (P2b)
Symptomatic lab-conf
76.0%
(66–84)

Forest-plot-style effect estimates; violet dashed = Investigational Prophylactic target.