Simply said, inferring from those answers, the longer a virus is in a host, the more dice rolls. So the worse a partial vaccine works, the more dice rolls, but

Simply said, inferring from those answers, the longer a virus is in a host, the more dice rolls. So the worse a partial vaccine works, the more dice rolls, but less for someone not vaccinated. On Delta, numbers are still coming in afaik (I did read something in the range of 36-high eighties for a breakthrough case in another article today, but again more data is needed)