Researchers found high effectiveness of the 2024–2025 COVID-19 vaccine among adults treated across 381 emergency department and/or urgent care sites and 246 hospitals in 6 states between September 2024 and September 2025, as published this week in JAMA Internal Medicine. Among adults, vaccination was associated with a 26% reduction in COVID-19–related emergency department and urgent care visits, a 35% reduction in COVID-19–related hospitalizations, and a 41% reduction in critical illness compared with no vaccine. Protection …
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