疾控中心说，因为病征接受流感检测的人有三分之一确证患流感。

About one third of people tested for flu because of their symptoms actually had influenza, the CDC said.

youdao

三个星期后，安慰剂小组有百分之六十的病人报称病征得到解除。而未经受任何治疗的小组的数字仅有百分之三十五。

After three weeks, 60 percent of the placebo group reported relief from symptoms, compared to 35 percent who'd received no treatment at all.

youdao