It was the basic method used at that time.

这是当时使用的基本方法。

The head of the world body insist, without mandating basic outbreak control methods, such as physical distancing, wearing masks or staying home, and sick

世界卫生组织的负责人坚持认为，这些国家没有采取基本的疫情控制方法，例如身体上保持距离，戴口罩或待在家里，这导致很多人患病。