Just one month ago, the idea that most people aren’t susceptible to COVID-19 — perhaps the overwhelming majority — was considered dangerous denialism. It was startling when Nobel-prize-winning scientist Michael Levitt argued in UnHerd at the start of May that the growth curves of the disease were never truly exponential, suggesting that some sort of “prior immunity” must be kicking in very early.Freddie Sayers writes in Unherd that today, though, the presence of some level of prior resistance and immunity to COVID-19 is fast becoming accepted scientific fact. Now, from the unlikely source — Professor Karl Friston, who, like Michael Levitt, is a statistician not a virologist, and who is a prominent member of the “Independent SAGE committee,” the group set up by Sir David King to challenge government scientific advice — comes a claim that the true portion of people who are not even susceptible to COVID-19 may be as high as 80%.