Flu Shot Doing Poor Job of Protecting Older People

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  • Flu Shot Doing Poor Job of Protecting Older People - ABC News
    http://abcnews.go.com/Health/wireStory/flu-shot-poor-job-worst-bug-seniors-18557654

    It turns out this year’s flu shot is doing a startlingly dismal job of protecting older people, the most vulnerable age group.

    The vaccine is proving only 9 percent effective in those 65 and older against the harsh strain of the flu that is predominant this season, the Centers for Disease Control and Prevention said Thursday.

    Cette année, le vaccin contre la grippe est particulièrement peu efficace, en particulier chez les personnes âgées.

    Overall, across the age groups studied, the vaccine’s effectiveness was found to be a moderate 56 percent, which means those who got a shot have a 56 percent lower chance of winding up at the doctor with the flu. That is somewhat worse than what has been seen in other years.

    For those 65 and older, the vaccine was only 27 percent effective against the three strains it is designed to protect against, the worst level in about a decade. It did a particularly poor job against the tough strain that is causing more than three-quarters of the illnesses this year.

    Le vaccin a été conçu en ciblant 3 souches. Il est le moins efficace contre la plus virulente des 3 qui est aussi la plus fréquente (trois quarts des cas)…

    N.B. : je ne sais pas trop comment le dernier paragraphe ci-dessus est compatible avec le premier du billet… Peut-être les 9% d’efficacité contre la souche la plus virulente, moyennés avec une efficacité des deux autres souches autour de 60% ?

    N.B. 2 : résultat préliminaire sur un échantillon de taille restreinte : moins de 300 personnes dans la tranche concernée des plus de 65 ans.