survey findsTheeffectivenessof this year's influenza vaccine was lower in South America than last season, the Centers for Disease Control and Prevention reported Thursday, which might be a clue to how much protection theshotscould offer people in the U.S. this winter.Vaccine effectiveness was 34....
This season's flu vaccine has reduced the risk of influenza-associated medical visits by 61% across all age groups, according to the Centers for Disease Control and Prevention (CDC). Thus far it appears to be outpe...
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 ea...
The regular change in the virus is the reason the vaccine is updated every year. TheAustralian Influenza Vaccine Committeemeets late in the year to plan what should be included in the vaccine for the following season, after considering what happened in our last flu season and in the Northern ...
This doesn't mean that we're having a pandemic right now, just that levels of influenzalike illness are around as high as we saw in 2009," she said. Hospitalization rates are at a decade high, she said, for cases typically seen at this time of year. A vaccination effectiveness (VE) ...
public officials are still urging anyone who hasn't yet gotten their flu shot to get one as soon as possible. However, even if every single person got a shot in the arm, the vaccine(疫苗)--- with its excellent 36 percent effectiveness---would not prevent everyone from getting infected wi...
It's important to know that each year the flu vaccine is never 100% effective in preventing flu. Vaccine effectiveness varies from year to year, based on the match of the circulating flu types to the strains contained in the vaccine. ...
D. The effectiveness of a flu vaccine. 3. Why does the author provide the CDC’s figures? A. To show many people suffer from serious diseases each year. B. To show flu vaccines are sometimes ineffective. C. To show flu is a major cause of human death. D. To show vaccines can stil...
This season'sinfluenzavaccine effectiveness is 45% overall and 55% in children, according to preliminary estimates from the Centers for Disease Control and Prevention (CDC). Vaccine effectiveness (VE) was higher against influenza B/Victoria (50%) and considerably lower against influenza A(H1N1)pdm...
The vaccine’s effectiveness can vary depending on how well matched the vaccine is to circulating influenza strains. TheCDC citesvaccine effectiveness against “medically attended illness” anywhere from 23% to 61% depending on the year and vaccine-to-strain match. It’s true, then, that you co...