I am a doctor at a Children's Hospital and received the flu shot this evening. I believe the nurse put it in the joint space as the injection site is far too high on my arm. She also took a long time pushing it in. My arm is swollen and hurts in the entire joint! The good news is some studies have shown that intra-articular immunizations yield higher immune responses giving you an even less likely chance of getting the flu. I am praying this pain doesn't last for more than a day or so... Good luck, ladies!