facebook
twitter
rss
account
search
search
 

Flu vaccine nearly useless for elderly

Feb. 21, 2013 at 6:51 PM   |   Comments

ATLANTA, Feb. 21 (UPI) -- This year's seasonal flu vaccine was 50 effective for those ages 50-64, but only 9 percent effective for those age 65 and older, U.S. health officials say.

Preliminary findings, published Thursday in the Centers for Disease Control and Prevention's Morbidity and Mortality Weekly Report, were based on a survey of 2,697 children and adults enrolled in the U.S. Influenza Vaccine Effectiveness Network from Dec. 3, 2012, to Jan. 19, 2013.

Among the patients with influenza, 32 percent had gotten the 2012-13 seasonal influenza vaccine, compared with 50 percent of the influenza-negative controls. For people with medically attended acute respiratory illness, the overall vaccine effective against influenza A and B virus infections was 56 percent, the report said.

Among the 751 infections with influenza A viruses, 98 percent of the infections were caused by influenza A (H3N2) viruses.

The adjusted vaccine effectiveness for all ages against influenza A (H3N2) virus infection was 47 percent; 58 percent for persons age 6 months-17 years, 46 percent for persons ages 18-49, 50 percent for those ages 50-64 and 9 percent for persons age 65 and older.

© 2013 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
Recommended UPI Stories
Featured UPI Collection
trending
Notable deaths of 2014 [PHOTOS]

Notable deaths of 2014 [PHOTOS]

Most Popular
1
Police search for California man with drug-resistant TB
2
New research explains insomnia prevalence among elderly
3
New data shows Melbourne is most well-rested city in the world
4
New research details rare cancer that killed Bob Marley
5
Daughters more likely than sons to care for elder parents
Trending News
Video
x
Feedback