CDC says the flu vaccine will be less effective this year
Flu vaccine might be less effective this year, new CDC report suggests
Last year, the CDC's report had estimated vaccine effectiveness in South America was 51.9% against hospitalization among at-risk groups. A study by the same group looking at data from 2013 to 2017 estimated effectiveness was around 43% for fully vaccinated young children and 41% for older adults.
CDC: 35% flu vaccine efficacy in South America may predict similar for US season
This flu season, the United States is using trivalent (three-strain) vaccines with the same components as those in Southern Hemisphere vaccines, Zeno said.
The CDC says the flu vaccine will be less effective this year
Last year, the U.S. Centers of Disease Control and Prevention said that data indicated vaccines would reduce the risk of hospitalization by 50%. This year’s data indicates the 2025-25 season vaccine will reduce the risk by just 35%.
Flu vaccine lowered risk of hospitalization in Southern Hemisphere by 35%: CDC study
This year's flu vaccine reduced the risk of hospitalization in the Southern Hemisphere but wasn't as effective as the one used in the prior season, a new CDC study found.
New flu shot in development as current vaccine shows reduced effectiveness
The Centers for Disease Control and Prevention (CDC) has announced that this year's flu vaccine may not be as effective as in previous years.
Flu vaccine efficacy against hospitalization may be lower this season: CDC
Early estimates on the effectiveness of this year’s flu vaccines indicate they may be less effective at preventing hospitalization than in years past, based on data from South America, where the annual flu season occurs earlier.
CDC warns flu vaccine may not be as effective in preventing hospitalization as previous seasons
Although the effectiveness of the vaccine in preventing hospitalizations appears to be lower in South America, the agency said vaccines still “significantly lowered the risk for hospitalization."
The Flu Vaccine Might Be Less Effective This Year
The CDC says the influenza vaccine being used this flu season might be less effective than the one used last flu season, based on reports of how well the vaccine is working in five South American countries.
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