CDC: 2012-2013 flu vaccine not as effective in elderly

February 25, 2013
CDC: 2012-2013 flu vaccine not as effective in elderly
Vaccination against influenza for the 2012/2013 flu season appears to be moderately effective in reducing the need for outpatient medical attention, but the effect is lower in the elderly, according to research published in the Feb. 22 issue of the U.S. Centers for Disease Control and Prevention's Morbidity & Mortality Weekly Report.

(HealthDay)—Vaccination against influenza for the 2012/2013 flu season appears to be moderately effective in reducing the need for outpatient medical attention, but the effect is lower in the elderly, according to research published in the Feb. 22 issue of the U.S. Centers for Disease Control and Prevention's Morbidity & Mortality Weekly Report.

Lisa Jackson, M.D., of the CDC in Atlanta, and colleagues analyzed data from the U.S. Influenza Vaccine Effectiveness Network to estimate vaccine effectiveness (VE) for the 2012/2013 influenza season.

The researchers estimated the overall VE against influenza A and B to be 47 and 67 percent, respectively, or 56 percent overall, which was close to the interim estimate of 62 percent. When stratified by age group, the estimates for VE against influenza A (H3N2) and B infections were mostly consistent across age groups, with the exception that lower VE against influenza A (H3N2) was seen among adults aged 65 and older. These findings suggest vaccination against influenza reduces the risk of illness requiring outpatient medical visits by one-half to two-thirds for most people, although VE was lower and not statistically significant among people aged 65 and older.

"Antiviral medications should be used as recommended for treatment of suspected influenza in certain patients, including those aged ≥65 years, regardless of their influenza vaccination status," the authors write.

Explore further: Flu vaccine not associated with reduced hospitalizations or outpatient visits among young children

More information: Full Text

Related Stories

CDC: Influenza activity increasing across the U.S.

January 5, 2013

(HealthDay)—Flu season descended on the United States early and hard this winter, with significant increases in flu activity observed over the past month, according to an update issued Jan. 4 by the U.S. Centers for Disease ...

CDC: Flu activity still up in U.S. in fourth week of 2013

February 4, 2013

(HealthDay)—In the fourth week of 2013, influenza activity remained elevated in the United States, with the proportion of pneumonia and influenza-linked deaths above the epidemic threshold, according to FluView, a weekly ...

Recommended for you

Treatment options for opioid addiction are expanding

August 10, 2016

In the past two decades, the devastation associated with opioid addiction has escaped the relative confines of the inner city and extended to suburban and rural America. Due in large part to the proliferation of prescription ...

Can exercise be replaced with a pill?

October 2, 2015

Everyone knows that exercise improves health, and ongoing research continues to uncover increasingly detailed information on its benefits for metabolism, circulation, and improved functioning of organs such as the heart, ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.