@BillHanage The impact of lifelong debilitation is high enough that being precautionary without certainty or even high confidence of risk is perfectly reasonable. Indeed uncertainty itself calls for precaution.
@BillHanage终身衰弱的影响非常大，因此在没有确定性甚至对风险没有高度信心的情况下采取预防措施是完全合理的。事实上，不确定性本身就需要预防。