Last week, we asked what readers want to know about the flu now that flu season is upon us. You asked a lot of smart questions, most of them about the vaccine.

After seeing some themes emerge, we chose four finalists, and now you get to decide what we delve into. Vote below!

If you’re using our mobile app, click here to vote. To submit your own question, click here.

And please note that if you have an ad blocker on, you will have to disable it to vote.