Why Does the Power of the Flu Shot Change Each Year?

It’s still flu season, but a preliminary report by the US Centers for Disease Control suggests this year’s flu shot is nearly 50 percent effective at reducing a person’s chance of getting sick. This is actually pretty good considering that, just two years ago, the flu shot’s effectiveness was down at a paltry 19…

Read more…

No Responses to “Why Does the Power of the Flu Shot Change Each Year?”

Post a Comment