The influential professor's statistical observations could radically change how we lift lockdownJust 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. Today, though, the presence of some level of prior resistance and immunity to Covid-19 is fast becoming accepted scientific fact. Results have just been published of...