The next major pandemic is coming. It’s already on the horizon, and could be far worse — killing millions more people — than the last one. We don’t yet know for certain what form it will take — just that its arrival, according to global health experts, is not just a possibility but a probability. To combat Disease X — as the World Health Organisation ominously calls it — we will once again need vaccines to be engineered and delivered in record time. But, as things stand, there is absolutely no guarantee that will happen. By contrast, we may well...