Where is Tiffany Dover? The Fainting Nurse

Why did her social media go silent? Why did they release a video of someone apparently pretending to be her. Eye color, hair line, skull shape, body shape and size are measurably different. Would a critical care frontline worker have an issue that makes her pass out every week? That doesn't seem safe. If she passed out from the shot and not the vaccine then why was it over 17 minutes after she got the shot that she passed out? I would hate to think that this is what it looks like.