新冠病毒疾病帶原者如果不戴口罩，健康的接觸者戴口罩，這樣傳染率是70%，如果新冠病毒疾病帶原者戴口罩，健康的接觸者不戴口罩，傳染率是5%，如果新冠病毒疾病帶原者和健康的接觸者兩人都帶口罩，傳染率是1.5%。

No response has been written yet. It is recommended to maintain a healthy skepticism towards it.