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Vaccination reduces the risk of COVID-19 hospitalization and severe in-hospital outcomes, but the magnitude of reduction varies by vaccine formulation, population, timing, and study design; recent 202...
The body of 2024–2025 analyses shows a consistent pattern: compared with unvaccinated adults, though absolute protection varied by age, immune status, and time since vaccination. Key U.S. surveillance...
Real‑world studies from 2024–2026 show that the seasonally updated, variant‑adapted COVID‑19 vaccines consistently reduce the risk of the worst outcomes: across multiple large datasets vaccine effecti...
Available studies and public-health reviews show mRNA boosters reduce hospitalizations and emergency visits compared with being unboosted, particularly in older adults; head‑to‑head comparisons betwee...
Peer-reviewed and network studies from 2022–2024 consistently report that mRNA booster doses reduce from Omicron subvariants but the magnitude of protection varies by subvariant, vaccine formulation, ...
COVID-19 vaccines substantially reduce the risk of severe illness, hospitalization, and death across multiple studies and reviews, though protection against infection—especially symptomatic or asympto...