> The only way around that is to gather more evidence... That begs the question as to whether an evidence-based approach is the right approach in all circumsta

> The only way around that is to gather more evidence... That begs the question as to whether an evidence-based approach is the right approach in all circumstances. Another way around it is to not fully rely on an evidence-based approach, and take precautions before the evidence comes in. In some circumstances (e.g. rapid spread of an poorly understood disease) waiting for an evidence-based decision before taking precautions might be too slow.