My wife and I got injected with the J&J shot yesterday at 4:12pm. Arm was sore last night. Nothing else. I woke up the this morning at 6am with my dog with chills, entire body aches and a fever that hit 101 at 3pm today. Just like the flu or a other virus. I could feel it break about an hour ago. Chills and aches have mostly subsided. My wife had nothing other than sore arm. Go figure...