In the early days when it was much more severea, the woohun a th. A number of people got it, had a bad experience, but never had to go to the hospital,. Never went on a ventilator. And then we all said, well, lucky you. You're now immune. Cause that's the way we thought about things. There is some ambiguity, because its you always want to separate. Did you really get covid, completely cleared it, and then they got it again? Or did you get covid and it just never really cleared? Some believe that that is the basis by which the variants have evolved, like omicron.