The CDC reported that the latest COVID-19 booster is about 54% effective against infection, including the XBB.1.5 strain and the newly dominant JN.1 subvariant in the U.S. The study, highlighted in the CDC’s Morbidity and Mortality Weekly Report, involved over 9,000 individuals, showing significant protection, particularly among high-risk groups. Ruth Link-Gelles emphasized the importance of the booster, comparing its efficacy to that of influenza vaccines in a good year. Vaccine effectiveness was observed to wane over time, but the booster remains critical in preventing hospitalizations and deaths.
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[Source: STAT, February 2nd, 2024]