这篇文章很有意思，值得关注。

两组随机试验，一组只要出门，就必须戴口罩，对照组不戴。
结果无论研究者怎么处理数据，都发现两组结果没有差异。
But no matter how the researchers sliced and diced their data, they could not find a strong signal that the volunteers in the mask group were more protected than their counterparts in the control group.

 

接着，奇怪的事情发生了！

然后他们就解释，说其中原因是：戴口罩的一组，口罩戴的时间不够！
In a typical clinical trial, this is the point where researchers would say their intervention didn’t work. But in this case, the investigators went the other way.

The problem, they said, wasn’t with the masks. The problem was that people didn’t use masks enough.

一出门就戴上口罩，这还不够吗？

 

这篇文章我没有再往下看，估计都是砖家们把烂泥糊上墙。