I'm really close, but if you could tell me some more about herd immunity and how the experts across the globe are telling people that if they've had covid they don't need a vaccine? Or, to make it easier, just provide a list of some of the 195 countries who's taking that official stance.
Edit: Feel free to comment on Sweden, since you claimed they had herd immunity a year ago (apparently they had herd immunity in July, but lost is in Nov). Certainly they have no need for vaccines.