Achieving herd immunity is possible – and necessary – but requires quick action, say experts
As ambitious declarations go – even for Boris Johnson – it was a big one. At the weekend, the UK prime minister said he would urge the G7 leaders to vaccinate the world against Covid by the end of next year.
But is this feasible? That rather depends on your definition. No country will vaccinate every adult. Vaccinating enough to achieve herd immunity, which could be 60% or 70%, is the real aim. It is possible to achieve that by December 2020, say experts, but only if the G7 leading economies move immediately to make it happen.
