[2aProtectsTheRest]

Prevents contracting the disease would be the common meaning there.

Also, specifically for the flu vaccine, even in cases where the vaccinated person still contracted the flu, there is a huge drop in the risk of having a severe case requiring medical attention: https://www.cdc.gov/flu/spotlights/2017-2018/vaccine-reduces-risk-severe-illness.htm

So if you get the flu vaccine, there’s a 40-60% chance (depending on the year) that you won’t get the flu at all, and if you do get the flu, there’s a 37% lower chance you’ll wind up in the hospital and an 82% lower chance you’ll wind up in the ICU.

Not bad for a free 5-minute shot at Walgreens!

[Shethink13]

So if you get the flu vaccine, there’s a 40-60% chance (depending on the year) that you won’t get the flu at all, and if you do get the flu, there’s a 37% lower chance you’ll wind up in the hospital and an 82% lower chance you’ll wind up in the ICU.

And what’s the chance that you’ll get the flu or end up in the hospital if you don’t get the vaccine?

And where do the cases come from that are included in the effectiveness studies? Where does the data come from?

[Shethink13]

So if you get the flu vaccine, there’s a 40-60% chance (depending on the year) that you won’t get the flu at all, and if you do get the flu, there’s a 37% lower chance you’ll wind up in the hospital and an 82% lower chance you’ll wind up in the ICU.

Lower chance than what? What is the other side of this equation? Lower than if you don’t get the vaccine?