Some people say that he is ill. What did you say?/Sorry?

If it was a joke between friends, I might say, "You have medicine!" " .

If the other person really scolds me, then I will reply, "You are sick, your whole family is sick and crazy!" " " .

But maybe I'll say, "Yes, I'm just sick. What's wrong with you? "

Maybe I won't answer anything, because maybe I am really wrong. . . . . .