My grandmother saw the Ribnitzer tell a girl who hadn’t been able to walk (either it had been a long time since she had or she hadn’t been able to since birth, I can’t recall) “Come here” and she walked to him.
I was getting sick every month for 2 years. After I got married I went to Rav Chaim Kanievsky and he told me that since I just got married I don’t need to worry about it anymore and it never happened again.