Shingles Shots

What is up with the signs at Walgreens for shingles shots? What is that all about? Is that something like the flu shot? I am so confused.

You know, the one time I got a flu shot I got really sick two days later. So I don’t think the flu shot works for me. And I sure don’t want to get a shingles shot and then end up with the shingles. That would totally suck.