Comment I've crunched the numbers and a herd immunity strategy would lead to a lot of deaths -- -- A couple of MPs have recently advocated the ideas in the “Great Barrington Declaration”. It’s the plan that we should end restrictions, get back to normal, and build up herd immunity among working age people, while isolating pensioners and other vulnerable people for six months or so as the virus spreads. -- -- safely supply them with food as the virus spiked. How many people would likely die on the way to herd immunity? Well, although younger people are less likely to die of Covid-19, some do, and the isolation of old and ill people could never be complete: some -- -- About eight per cent of people have had the virus so far (call it 10 per cent to be generous) and on the common assumption that we’ve need to get to 60 per cent for herd immunity to work, we’d need around a further 50 per cent of the younger population to get it. -- -- its lead authors predicted in May: “I think that the epidemic has largely come and is on its way out in this country.” She said the decline in cases was “due to the build-up of immunity.” She was wrong. That’s important because the same reason they wrongly thought it was